Abstract
Over the past 150 years, since Vogel in 1820 isolated the parent oxygen heterocycle, coumarin (1) from Coumarouna odorata = Dipteryx odorata (1), coumarins have been recognized as widely distributed plant products. The vast majority carry an oxygen substituent at C-7; consequently 7-hydroxycoumarin [umbelliferone, (2)], one of the most widely distributed coumarins, is often regarded as the parent, in a structural sense and also biogenetically, of a large number of the structurally more complex coumarins. A number of review articles on natural plant coumarins have appeared (154, 302, 344, 420, 525, 541, 548) since the last in this series (153), the most comprehensive, albeit dealing solely with coumarins of the Umbelliferae, being that of Nielsen in 1970 (419).
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References
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Hata, K.: Studies on the Chemical Components of Umbelliferous Plants II. Components of Angelica glabra Makino (2). Yakugaku Zasshi 76, 666 (1956); Chem. Abs. 51, 1152 (1957).
Hata, K., and M. Kozawa: The Constitution of Angelol, a New Coumarin Isolated from the Root of Angelica pubescens Maxim. ( Umbelliferae ). Tetrahedron Letters 1965, 4557.
Hata, K., and M. Kozawa: The Formation of Angelical from Angelol, a New Coumarin Isolated from the Root of Angelica pubescens Maxim. (Umbelliferae). Yakugaku Zasshi 87, 210 (1967); Chem. Abs. 67, 43633 (1967).
Hata, K., and M. Kozawa: Studies on Coumarins from the Root of Angelica pubescens Maxim I. The Structure of Angelol. Yakugaku Zasshi 88, 283 (1968); Chem. Abs. 69, 59041 (1968).
Hata, K., and M. Kozawa: Studies on Coumarins from the Root of Angelica pubescens Maxim II. Absolute Configuration of Angelol. Yakugaku Zasshi 88, 293 (1968); Chem. Abs. 69, 59039 (1968).
Hata, K., M. Kozawa, and K. Baba: Coumarins from Chinese Crude Drug “She Huangzi”, the Fruits of Cnidium sp. and from Cnidium japonicum Miq. Yakugaku Zasshi 92, 1289 (1972); Chem. Abs. 78, 33845 (1973).
Hata, K., M. Kozawa, K. Baba, and M. Mitsui: Chemical Components of the Roots of Ligusticum hultenii Fernald and Angelica shikokiana Makino. Yakugaku Zasshi 93, 248 (1973); Chem. Abs. 78, 133334 (1973).
Hata, K., M. Kozawa, K. Baba, and M. Mitsui: New Ester Coumarins, Angeladin and Isoedultin from Angelica longera- diata (Maxim.) Kitagawa. Chem. and Pharm. Bull. (Japan) 21, 518 (1973).
Hata, K., M. Kozawa, K. Baba, and K.-Y. Yen: Coumarins from the Roots of Angelica laxiflora Diels. Chem. and Pharm. Bull. (Japan) 19, 640 (1971).
Hata, K., M. Kozawa, and Y. Ikeshiro: The Constitution of Anomalin, a New Coumarin Isolated from the Root of Angelica anomala Lall (Umbelliferae). Chem. and Pharm. Bull. (Japan) 14, 94 (1966).
Hata, K., M. Kozawa, and Y. Ikeshiro: New Coumarins Isolated from the Roots of Angelica anomala and A. cartilaginomarginata. Yakugaku Zasshi 87, 1118 (1967); Chem. Abs. 68, 10231 (1968).
Hata, K., M. Kozawa, Y. Ikeshiro, and K.-Y. Yen: New Coumarins Isolated from the Root of Peucedanum formosanum Hayata and Peucedanum japonicum Thunb. Yakugaku Zasshi 88, 513 (1968); Chem. Abs. 69, 96521 (1968).
Hata, K., M. Kozawa, and K.-Y. Yen: The Constitution of Peuformosin, a New Coumarin Isolated from the Root of Peucedanum formosanum Hayata (Umbelliferae). Chem. and Pharm. Bull. (Japan) 14, 442 (1966).
Hata, K., and K. Sano: The Constitution of Decursin, a New Coumarin Isolated from the Root of Angelica decursiva Fr. et Sav. ( Umbelliferae ). Tetrahedron Letters 1966, 1461.
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Hata, K., and Y. Tanaka: Chemical Components of Umbelliferous Plants III. Components of the Root of Angelica pubescens. I. Yakugaku Zasshi 77, 937 (1958); Chem. Abs. 52, 3799 (1960).
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Hlubucek, J., E. Ritchie, and W. C. Taylor: Synthesis of 2,2-Dimethylchromenes. Tetrahedron Letters 1969, 1369.
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Hörhammer, L., H. Wagner, and D. Kraemer-He yd weiler: Neue Methoden im Pharmakognostischen Unterricht (12. Mitteilung): Identifizierung von Umbelliferen- wurzeln und Nachweis der wichtigsten Verfälschungen mit Hilfe der Dünnschichtchromatographie. Deut. Apotheker-Ztg. 106, 267 (1966); Chem. Abs. 65, 2065 (1966).
Ignat’eva, N. S., V. V. Vandyshev, and M. G. Pimenov: Coumarins from the Roots of Cachrys pubescens. Khim. prirod. Soedinenii 8, 388 (1972); Chem. Abs. 77, 149704 (1972).
Irie, H., S. Uyeo, K. Yamomoto, and K. Kinoshita: The Structure of Glaupalol, a Novel Furocoumarin from Glaucidium palmatum Sieb, et Zucc. Chem. Comm. 1967, 547.
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Ishii, H., K. Hosoya, T. Ishikawa, and J. Haginiwa: Studies on the Chemical Constituents of Rutaceous Plants. XX. The Chemical Constituents of Xanthoxylum arnottianum Maxim. (1). Isolation of the Chemical Constituents of the Xylem of Roots. Yakugaku Zasshi 94, 309 (1974); Chem. Abs. 81, 132752 (1974).
Ishii, H., K. Hosoya, T. Ishikawa, E. Ueda, and J. Haginiwa: Studies on the Chemical Constituents of Rutaceous Plants. XXI. The Chemical Constituents of Xanthoxylum arnottianum Maxim. (2). Isolation of the Chemical Constituents of the Xylem of Stems. Yakugaku Zasshi 94, 322 (1974); Chem. Abs. 81, 132753 (1974).
Ishii, H., and T. Ishikawa: Arnottinin: Structure Establishment by Chemical Correlation with Osthenol. Chem. and Pharm. Bull. (Japan) 23, 934 (1975).
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Jefferies, P. R., and G. K. Worth: The Chemistry of the Western Australian Rutaceae — VI. Two Novel Coumarins from Eriostemon brucei. Tetrahedron 29, 903 (1973).
Jensen, S. R., and B. J. Nielsen: A New Coumarin, Fraxidin 8-O-β-D-glucoside and 10-Hydroxyligstroside from Bark of Fraxinus exelsior. Phytochemistry 15, 221 (1976).
Joshi, B. S., and D. H. Gawad: Isolation of Some Furanocoumarins from Clausena indica and Identity of Chalepensin with Xylotenin. Phytochemistry 10, 480 (1971).
Joshi, B. S., and V. N. Kamat: Structures of Clausenin, Clausenidin and a Synthesis of Clausenin and Xanthoxyletin. Tetrahedron Letters 1966, 5767.
Joshi, B. S., V. N. Kamat, and D. H. Gawad: Structure of Clausindine, a New Coumarin from Clausenia indica Oliv. Experientia 30, 223 (1974).
Joshi, B. S., V. N. Kamat, and D. H. Gawad: Clausidine, a Novel Cyclopropylcoumarin. J. C. S. Perkin I 1974, 1561.
Joshi, B. S., V. N. Kamat, T. R. Govindachari, and A. K. Ganguly: Isolation and Structure of Surangin A and Surangin B, Two New Coumarins from Mammea longifolia (Wight) Planch and Triana. Tetrahedron 25, 1453 (1969).
Joshi, B. S., V. N. Kamat, and A. K. Saksena: Structures of Clausenin and Clausenidin, Two New Pyranocoumarins from the Roots of Clausena heptaphylla Wt. and Arn. Tetrahedron 23, 4785 (1967).
Joshi, B. S., Y. N. Shukla, D. S. Bhakuni, and M. M. Dhar: 6-(2,3-Dihydroxy- 3-methylbutyl)-7-methoxycoumarin, a New Coumarin from Micromelum pubescens Blume. Indian J. Chem. 13, 772 (1975).
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Kamilov, K. M, V. V. Kiseleva, and G. K. Nikonov: Diversoside, a New Coumarin from the Roots of Ferula diversivitatta. Khim. prirod. Soedinenii 10, 781 (1974); Chem. Abs. 82, 135684 (1975).
Kamilov, K. M., and G. K. Nikonov: Coumarins of Ferula kopetdaghensis and the Structure of Kopeolin and Kopeoside. Khim. prirod. Soedinenii 9, 308 (1973); Chem. Abs. 79, 134321 (1973).
Kamilov, K. M., and G. K. Nikonov: Structure of the Coumarin Reoselin. Khim. prirod. Soedinenii 10, 84 (1974); Chem. Abs. 80, 121275 (1974).
Kamilov, K. M., and G. K. Nikonov: Kamolone from the Roots of Ferula kopetdaghensis. Khim. prirod. Soedinenii 10, 85 (1974); Chem. Abs. 81, 60806 (1974).
Kamilov, K. M., and G. K. Nikonov: Coumarins of Ferula kopetdaghensis — Kopetdaghin and Kopeodin (Farnesiferol B). Khim. prirod. Soedinenii 10, 442 (1974); Chem. Abs. 82, 70266 (1975).
Kapoor, S. L., Y. N. Sharma, and A. Zaman: Extractives of Angelica glauca. Phytochemistry 11, 475 (1972).
Kariyone, T., and K. Hata: Studies on the Chemical Components of Umbelliferous Plants I. Components of the Roots of Angelica glabra Makino. Yakugaku Zasshi 76, 649 (1956); Chem. Abs. 51, 1152 (1957).
Kariyone, T., and T. Matsuno: Studies on the Constituents of Orange Oil. I. On the Structure of Auraptene. Pharm. Bull. (Japan) 1, 119 (1953).
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Khanna, P. L., and T. R. Seshadri: Synthesis of Isoprenoid Polyphenols. J. Sci. Ind. Res., India 33, 295 (1974).
Khasanov, T. K., A. I. Saidkhodzhaev, and G. K. Nikonov: Structure and Configuration of New Coumarins of the Roots of Ferula mogoltavica Khim. prirod. Soedinenii 10, 10 (1974); Chem. Abs. 80, 121131 (1974).
Structure and Configuration of the Coumarins Mogoltadone and Mogoltadin. Khim. prirod. Soedinenii 10, 25 (1974); Chem. Abs. 80, 121138 (1974).
Khasanov, T. K., A. I. Saidkhodzhaev, and G. K. Nikonov: Structure and Configuration of Polyanthin and Polyanthinin — New Coumarins from the Roots of Ferula polyantha. Khim. prirod. Soedinenii 10, 517 (1974); Chem. Abs. 82, 95266 (1975).
Structure of Feropolin, Feropolol, Feropolone, and Feropolidin. Khim. prirod. Soedinenii 12, 91 (1976); Chem. Abs. 85, 59558 (1976).
Structure of Mogoltacin. Khim. prirod. Soedinenii 12, 95 (1976); Chem. Abs. 85, 59561 (1976).
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Kikuchi, T., T. Yokoi, K. Umemoto, and T. Shingu: Constituents of Scaevola frutescens (Miller) Krause. Yakugaku Zasshi 94, 1616 (1974); Chem. Abs. 82, 135677 (1975).
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Kinoshita, K., and S. Murase: The Structure of eis- and /rafw-Glaupadiol. (Studies on the Constituents of the Rhizomes of Glaucidium palmatum Sieb, and Zucc.) Yakugaku Zasshi 93, 202 (1973); Chem. Abs. 78, 136129 (1973).
Kir’yalov, N. P.: The Structure of Cocanicine and Umbelliprenin, Components of the Neutral Part of Oil from Ferula cocanica. Trudy bot. Inst. Akad. Nauk S.S.S.R. 8, 7 (1961); Chem. Abs. 58, 498 (1963).
Kir’yalov, N. P.: Coumarins from Plants of the Genus Ferula. Trudy bot. Inst. Akad. Nauk S.S.S.R. 12, 82 (1965); Chem. Abs. 64, 3461 (1966).
Kir’yalov, N. P.: Isolation of the Coumarin Badrakemin from the Roots of Ferula badrakema. Khim. prirod. Soedinenii 3, 363 (1967); Chem. Abs. 69, 35865 (1968).
Kir’yalov, N. P.: The Coumarin Diversine from the Roots of Ferula diversivittata. Khim. prirod. Soedinenii 5, 51 (1969); Chem. Abs. 70, 118026 (1969).
Kir’yalov, N. P., and V. Y. Bagirov: Structure of Karatavicin. Khim. prirod. Soedinenii 3, 223 (1967); Chem. Abs. 68, 68829 (1968).
Kir’yalov, N. P., and V. Y. Bagirov: The Structure of Karatavic Acid. Khim. prirod. Soedinenii 4, 283 (1968); Chem. Abs. 70, 77715 (1969).
Kir’yalov, N. P., and V. Y. Bagirov: The Structure of Karatavicinol. Khim. prirod. Soedinenii 5, 225 (1969); Chem. Abs. 72, 55164 (1970).
Kir’yalov, N. P., and T. V. Bukreeva: A New Coumarin from the Roots of Ferula pseudooreoselinum. Khim. prirod. Soedinenii 8, 643 (1972); Chem. Abs. 78,108210 (1973).
Samarcandin Acetate from the Roots of Ferula pseudooreoselinum. Khim. prirod. Soedinenii 8, 798 (1972); Chem. Abs. 78, 108250 (1973).
Coumarins from the Roots of Ferula pseudooreoselinum. Khim. prirod. Soedinenii 9, 425 (1973); Chem. Abs. 79, 134324 (1973).
Kir’yalov, N. P., T. V. Bukreeva, V. A. Gindin, G. Mamatov, and I. S. Kozhina: The Structure of the Coumarin Glucoside Reoselin from the Roots of Ferula pseudooreoselinum. Khim. prirod. Soedinenii 11, 87 (1975); Chem. Abs. 83, 97826 (1975).
Kir’yalov, N. P., and S. D. Movchan: A New Glycoside, Reoseline from the Rosin of the Roots of Ferula pseudooreoselinum. Doklady Akad. Nauk. S.S.S.R. 148, 1081 (1963); Chem. Abs. 59, 5255 (1963).
Kir’yalov, N. P., and V. Y. Bagirov: The Structure of Gummosin. Khim. prirod. Soedinenii 2, 383 (1966); Chem. Abs. 67, 11394 (1967).
The Structure of Samarcandin and Samarcandone, Coumarin Compounds from Ferula samarcandica. Khim. prirod. Soedinenii 4, 73 (1968); Chem. Abs. 69, 59040 (1968).
Kiseleva, V. V., G. K. Nikonov, and M. O. Karryev: Structure of Diversin and Diversinin, Coumarins of Ferula diversivittata. Khim. prirod. Soedinenii 11, 344 (1975); Chem. Abs. 84, 28001 (1976).
Komatsu, S., S. Tanaka, S. Ozawa, R. Kubo, Y. Ono, and Z. Matsuda: Biochemical Studies on Grape Fruits, Citrus aurantium L. J. Chem. Soc. Japan 51, 478 (1930).
Komissarenko, N. F., and V. T. Chernobai: Furocoumarins of Cnidium dubium. Khim. prirod. Soedinenii 2, 375 (1966); Chem. Abs. 67, 11395 (1967).
Konoshima, M., H.-J. Chi, and K. Hata: Coumarins from the Root of Angelica gigas Nakai. Chem. Pharm. Bull. (Japan) 16, 1139 (1968).
Krivut, B. A., L. G. Avramenko, M. E. Perel’son, and G. K. Nikonov: Preparation and Quantitative Determination of Benzoylmarmesin. Khim. prirod. Soedinenii 6, 526 (1970); Chem. Abs. 74, 53420 (1971).
Kuffner, F., A. Nikiforov, and G. Schulz: Über das Rutolid. Monatsh. 104, 911 (1973).
Kutney, J. P., G. Eigendorf, T. Inaba, and D. L. Dreyer: Mass Spectral Fragmentation Studies in Monomeric and Dimeric Coumarins. Org. Mass Spectrom. 5, 249 ( 1970.
Kutney, J. P., P. J. Salisbury, and A. K. Verma: Biosynthetic Studies in the Coumarin Series — III. Studies in Tissue Cultures of Thamnosma montana Torr, and Frem. The Role of Mevalonate. Tetrahedron 29, 2673 (1973).
Kutney, J. P., A. K. Verma, and R. N. Young: Studies on Constituents of Thamnosma montana Torr, and Frem. The Structure of Thamnosmin, a Novel Coumarin Epoxide. Tetrahedron 28, 5091 (1972).
Biosynthetic Studies in the Coumarin Series — I. Studies in Plants of Thamnosma montana Torr, and Frem. The Role of Mevalonate. Tetrahedron 29, 2645 (1973).
Biosynthetic Studies in the Coumarin Series — II. Studies in Plants of Thamnosma montana Torr, and Frem. The Role of Acetate and Glycine. Tetrahedron 29, 2661 (1973).
Kutney, J. P., R. N. Young, and A. K. Verma: Novel Epoxides from Thamnosma montana Torr, and Frem. Tetrahedron Letters 1969, 1845.
Kuznetsova, G. A.: Discovery of Imperatorin Oxide in Plants. Zhur. obshchei Khim. 35, 403 (1965); Chem. Abs. 62, 15071 (1965).
Kuznetsova, G. A.: Natural Coumarins and Furocoumarins: Leningrad: Nauka. 1967; Chem. Abs. 67, 108551 (1967).
Kuznetsova, G. A., and A. Z. Abyshev: Natural (-)-7-Methoxy-8-(β,γ-dihydro- xyisopentyl)-coumarin. Khim. prirod. Soedinenii 1, 283 (1965); Chem. Abs. 64, 683 (1966).
Kuznetsova, G. A., and A. Z. Abyshev: Merancin Hydrate — A Component of the Roots of Prangos ferulacea (L.) Lindl. Zhur. priklad. Khim. 38, 2370 (1965); Chem. Abs. 64, 2326 (1966).
Kuznetsova, G. A., A. Z. Abyshev, M. E. Perel’son, Y. N. Sheinker, and G. Y. Pek: A New Coumarin, Pranferol, from the Roots of Prangos ferulacea. Khim. prirod. Soedinenii 2, 310 (1966); Chem. Abs. 66, 94923 (1967).
Kuznetsova, G. A., and L. M. Belenovskaya: A Chemical Study of the Roots of Prangos ornata Kuzm. Khim. prirod. Soedinenii 1, 430 (1965); Chem. Abs. 64, 13088 (1965).
Kuznetsova, G. A., and L. M. Belenovskaya: Isolation of Oxypeucedanin Hydrate (Prangol) from the Roots of Prangos fedtschenkoi (Rgl. et Schmal.) Eug. Kor. Zhur. priklad. Khim. 38, 1146 (1965); Chem. Abs. 63, 6021 (1965).
Kuznetsova, G. A., and L. M. Belenovskaya: Prantschimgin, a New Coumarin from the Roots of Prangos tschimganica. Khim. prirod. Soedinenii 2, 235 (1966); Chem. Abs. 66, 2438 (1967).
Kuznetsova, G. A., and L. M. Belenovskaya: Additional Information on the Coumarin Composition of Prangos fedtschenkoi (Regel et Schmalh). Korob., P. tschimganica B. Fedtsch and P. isphairamica B. Fedtsch. (Umbelliferae). Zhur. priklad. Khim. 42, 471 (1969); Chem. Abs. 71, 811 (1969).
Kuznetsova, G. A., and V. N. Florya: Coumarins from the Roots, Aboveground Parts, and Fruits of Seseli campestre Growing in Moldavia. Zhur. priklad. Khim. 43, 1412 (1970); Chem. Abs. 73, 117214 (1970).
Kuznetsova, G. A., and N. F. Gashimov: The Structure of a New Coumarin from Haplophyllum pedicellatum. Khim. prirod. Soedinenii 8, 666 (1972); Chem. Abs. 78, 108171 (1973).
Kuznetsova, G. A., and N. F. Gashimov: A New Coumarin, Pedicellone from Haplophyllum pedicellatum. Khim. prirod. Soedinenii 9, 113 (1973); Chem. Abs. 79, 5223 (1973).
Kuznetsova, G. A., and G. V. Pigulevskii: The Structure of Prangenine. Zhur. obshchei Khim. 31, 323 (1961); Chem. Abs. 55, 22282 (1961).
Kuznetsova, G. A., and L. M. Sokolova: Coumarins from the Roots of PrangosNaturally Occurring Plant Coumarins fedtschenkoi (Rgl. et Schmalh.) Eug. Kor. Zhur. priklad. Khim. 37, 1105 (1964); Chem. Abs. 61, 4630 (1964).
Kuznetsova, G. A., and A. D. Zorina: Coumarins from the Roots of Prangos serawschanica (Rgl. et Schmalh.) Korov. Zhur. priklad. Khim. 39, 482 (1966); Chem. Abs. 65, 1043 (1966).
Lahey, F. N., and J. K. MacLeod: The Coumarins of Geijera parviflora Lindi. Austral. J. Chem. 20, 1943 (1967).
Halfordin and Isohalfordin — Revised Structures. Tetrahedron Letters 1968, 447.
Lahey, F. N., and D. J. Wluka: Geijerin, a New Coumarin from the Bark of Geijera salicifolia Schott. Austral. J. Chem. 8, 125 (1955).
Lamberton, J. A., J. R. Price, and A. H. Redcliffe: Micromelin, a New Coumarin from Micromelum minutum (Forst. f.) Seem (Family Rutaceae). Austral. J. Chem. 20, 973 (1967).
Lapper, R. D.: The Carbon-13 Nuclear Magnetic Resonance Spectrum of Siderin. Tetrahedron Letters 1974, 4293.
Larsen, P. K., and F. Sandberg: Constituents of Umbelliferous Plants. XV. Coumarins from Thapsia garganica L. The Structure of a New Coumarin. Acta Chem. Scand. 24, 1113 (1970).
Lassak, E. V., and J. T. Pinhey: The Constituents of Eriostemon trachyphyllus. The Structure of Trachyphyllin, a New Coumarin. Austral. J. Chem. 22, 2175 (1969).
Lassak, E. V., and I. A. Southwell: The Coumarins from the Resin of Evodia vitiflora. Austral. J. Chem. 25, 2491 (1972).
Laxmi, M. V., C. V. Ratnam, and N. V. Subba Rao: 7-Methoxy-8-(3-butenyl-3- methyl-2-oxo)-coumarin, a New Coumarin from Murraya exotica Linn. Indian J. Chem. 10, 564 (1972).
Lee, K.-H., and T. O. Soine: Coumarins VII: The Coumarins of Lomatium nuttalli. J. Pharm. Sci. 57, 865 (1968).
Lee, K.-H., and T. O. Soine: Coumarins IX: Coumarins of Spheriosciadium capitellatum (A. Gray). J. Pharm. Sci. 58, 675 (1969).
Lee, K.-H., and T. O. Soine: Coumarins X: Spectral Studies on Some Linear Furocoumarins. J. Pharm. Sci. 58, 681 (1969).
Lemmich, E., J. Lemmich, and B. E. Nielsen: Constituents of Umbelliferous Plants XIV. Coumarins of Peucedanum oreoselinum (L.) Moench. Acta Chem. Scand. 24, 2893 (1970).
Lemmich, J., E. Lemmich, and B. E. Nielsen: Constituents of Umbelliferous Plants VIII. Coumarins from the Root of Seseli libanotis (L.) Koch. The Structure of Three New Coumarins. Acta Chem. Scand. 20, 2497 (1966).
Lemmich, J., and B. E. Nielsen: Constituents of Umbelliferous Plants (X). Stereochemistry of Natural Coumarins Containing the 3-Hydroxy-2,2-dimethylchroman System. Tetrahedron Letters 1969, 3.
Lemmich, J., P. A. Pedersen, and B. E. Nielsen: Revised Absolute Configurations of Natural Khellactone Esters (1). Tetrahedron Letters 1969, 3365.
Lemmich, J., P. A. Pedersen, and B. E. Nielsen: Constituents of Umbelliferous Plants XVIII. Terpenoids and Coumarins of the Root of Ligusticum seguieri Koch. Acta Chem. Scand. 25, 344 (1971).
Coumarins and Terpenoids of the Fruits of Ligusticum seguieri. Phytochemistry 10, 3333 (1971).
McCabe, P. H., R. McCrindle, and R. D. H. Murray: Constituents of Sneezewood, Ptaeroxylon obliquum (Thunb.) Radlk. Part I. Chromones. J. Chem. Soc. (C) 1967, 145.
McLeod, J. K.: Halfordinin, a 3,4,5-Oxygenated Furocoumarin with a Novel α, α - Dimethylallyl Ether Substituent. Tetrahedron Letters 1970, 1319.
McLeod, J. K.: Halfordinin — A Revised Structure. Tetrahedron Letters 1970, 3611. Fortschritte d. Chem. org. Naturst. 35
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Nikonov, G. K.: A Study of Cnidimin and Its Identification with Libanotin. Khim. prirod. Soedinenii 4, 48 (1968); Chem. Abs. 69, 77062 (1968).
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Nikonov, G. K., and A. A. Ivashenko: The Chemical Structure of Morison’s Mountain Parsley Peucedanum morisonii Bess. Zhur. obshchei Khim. 33, 2740 (1963); Chem. Abs. 60, 1725 (1964).
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Murray, R.D.H. (1978). Naturally Occurring Plant Coumarins. In: Herz, W., Grisebach, H., Kirby, G.W. (eds) Fortschritte der Chemie Organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products. Fortschritte der Chemie Organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, vol 35. Springer, Vienna. https://doi.org/10.1007/978-3-7091-8505-6_4
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