Taxonomy: Physicochemical and Pharmacological Properties of Flavonoids – Arylcoumarins
Biological sources: Glycyrrhiza uralensis [1]
C21H20O7: 384.3893
Mp: 242°C, pale-yellow needles
[α]D 4.2° (c 1.0, EtOH)
UV: 212 (4.61), 254 (3.95), 354 (4.24) [1]
ESI-MS: 385.1262 (M + H)+, calcd for C21H20O7: 385.1287 [1]
1 H NMR (500 MHz, acetone-d6): 1.24, 1.28 (3H each, s, gem-dimethyl), 3.53 (2H, m, H-6), 4.11 (3H, s, OCH3), 4.75 (1H, dd, J = 8, 9.5, H-7), 6.42 (1H, s, H-9), 6.43 (1H, dd, J = 2.5, 8.5, H-5′), 6.46 (1H, d, J = 2.5, H-3′), 7.17 (1H, d, J = 8, H-6′), 8.02 (1H, s, H-4) [1]
13 C NMR (125.7 MHz, acetone-d6): [1]
Table 1
C-2 |
162.2 |
10 |
71.4 |
C-1′ |
115.7 |
3 |
121.0 |
4a |
107.0 |
2′ |
157.1 |
4 |
138.3 |
5a |
112.2 |
3′ |
104.5 |
5 |
153.4 |
8a |
166.0 |
4′ |
159.7 |
6 |
29.5 |
9a |
156.4 |
5′ |
108.2 |
7 |
91.8 |
OCH3 |
59.9 |
6′ |
132.6 |
9 |
92.2 |
gem-dimethyl |
25.4, 26.0 |
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References
T. Hatano, Y. Aga, Y. Shintani, H. Ito, T. Okuda, T. Yoshida, Phytochemistry 55, 959 (2000)
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(2013). Licofuranocoumarin. In: Azimova, S.S., Vinogradova, V.I. (eds) Natural Compounds. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0535-1_1005
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