1. Characteristic metabolites of Hypericum plants: their chemical structures and biological activities

   • Naonobu Tanaka
   • Yoshiki Kashiwada

   Review Open access 08 February 2021 Pages: 423 - 433

   

2. Discovery and investigation of natural Diels–Alderases

   • Kenji Watanabe

   Review Open access 08 March 2021 Pages: 434 - 447

   

3. Correction to: Discovery and investigation of natural Diels–Alderases

   • Kenji Watanabe

   Correction Open access 08 April 2021 Pages: 448 - 448

4. A review of antidiabetic active thiosugar sulfoniums, salacinol and neokotalanol, from plants of the genus Salacia

   • Toshio Morikawa
   • Kiyofumi Ninomiya
   • Osamu Muraoka

   Review Open access 26 April 2021 Pages: 449 - 466

   

5. Enzymatic reactions in teleocidin B biosynthesis

   • Takayoshi Awakawa

   Mini-Review Open access 06 March 2021 Pages: 467 - 474

   

6. Metabolic fingerprinting for discrimination of DNA-authenticated Atractylodes plants using ¹H NMR spectroscopy

   • Tatsuya Shirahata
   • Hiroshi Ishikawa
   • Yoshinori Kobayashi

   Original Paper Open access 11 February 2021 Pages: 475 - 488

   

7. Anti-Vpr activities of sesqui- and diterpenoids from the roots and rhizomes of Kaempferia candida

   • Prema
   • Takeshi Kodama
   • Hiroyuki Morita

   Original Paper 09 March 2021 Pages: 489 - 498

   

8. Simultaneous UHPLC/MS quantitative analysis and comparison of Saposhnikoviae radix constituents in cultivated, wild and commercial products

   • Hiroyuki Fuchino
   • Sayaka Murase
   • Nobuo Kawahara

   Original Paper 11 February 2021 Pages: 499 - 519

   

9. Anti-insulin resistance effect of constituents from Senna siamea on zebrafish model, its molecular docking, and structure–activity relationships

   • Wanlapa Nuankaew
   • Armad Heemman
   • Tong Ho Kang

   Original Paper 23 February 2021 Pages: 520 - 531

   

10. A novel challenge of nondestructive analysis on OGATA Koan’s sealed medicine by muonic X-ray analysis

    • Kayoko Shimada-Takaura
    • Kazuhiko Ninomiya
    • Kyoko Takahashi

    Original Paper 13 March 2021 Pages: 532 - 539

    

11. Dehydroabietic acid improves nonalcoholic fatty liver disease through activating the Keap1/Nrf2-ARE signaling pathway to reduce ferroptosis

    • Gai Gao
    • Zhishen Xie
    • Zhenqiang Zhang

    Original Paper 15 February 2021 Pages: 540 - 552

    

12. Alginic acid inhibits non-small cell lung cancer-induced angiogenesis via activating miR-506 expression

    • Keping Wang
    • Bin Wang
    • Rusong Yang

    Original Paper 05 March 2021 Pages: 553 - 564

    

13. Studies on cultivation of Angelica acutiloba using paper pot (Part 2): effect of difference in taproot base diameter of seedlings on growth after planting and quality of toki produced from paper pot seedlings

    • Yoshitomi Kudo
    • Hirokazu Ando
    • Yohei Sasaki

    Original Paper 08 March 2021 Pages: 565 - 576

    

14. Cloning of the cytochrome P450 enzyme from Perilla frutescens involved in nothoapiole biosynthesis

    • Mariko Baba
    • Michiho Ito

    Original Paper 29 March 2021 Pages: 577 - 589

    

15. Curcumin suppresses LGR5(+) colorectal cancer stem cells by inducing autophagy and via repressing TFAP2A-mediated ECM pathway

    • Xiaohong Mao
    • Xin Zhang
    • Ping Huang

    Original Paper Open access 13 March 2021 Pages: 590 - 601

    

16. Indole-3-carboxaldehyde regulates RSV-induced inflammatory response in RAW264.7 cells by moderate inhibition of the TLR7 signaling pathway

    • Xianbang Hou
    • Xueyuan Zhang
    • Liwei He

    Original Paper 23 March 2021 Pages: 602 - 611

    

17. Inhibitory activity of flavonoids from Ephedrae Herba on hypoxia signaling in PANC-1 cells and the evaluation of their mechanisms

    • Hiroaki Yahagi
    • Tadahiro Yahagi
    • Keiichi Matsuzaki

    Original Paper 04 April 2021 Pages: 612 - 622

    

18. Ellagitannins from Rosa roxburghii suppress poly(I:C)-induced IL-8 production in human keratinocytes

    • Satoru Takayama
    • Miho Kawanishi
    • Hiroyuki Tanaka

    Original Paper 08 April 2021 Pages: 623 - 632

    

19. Two new bisindole alkaloids from Tabernaemontana macrocarpa Jack

    • Puteri Amelia
    • Alfarius Eko Nugroho
    • Hiroshi Morita

    Original Paper 06 April 2021 Pages: 633 - 642

    

20. Ardisiatetrons A and B: tetronic acid derivatives and triterpenes from the leaves of Ardisia quinquegona and their biological activity

    • Susumu Kawakami
    • Misaki Ishinaka
    • Kentaro Yamaguchi

    Original Paper 27 April 2021 Pages: 643 - 654

    

21. β-elemene affects angiogenesis of infantile hemangioma by regulating angiotensin-converting enzyme 2 and hypoxia-inducible factor-1 alpha

    • Zhenyu Wang
    • Zhaoxiang Wang
    • Hua Xian

    Original Paper 16 April 2021 Pages: 655 - 663

    

22. Sedative effects of inhaled Perilla frutescens essential oils on mice

    • Yue Ota
    • Michiho Ito

    Note 12 February 2021 Pages: 664 - 669

    

23. Two new xanthones from the root of Thai Calophyllum inophyllum and their toxicity against colon and liver cancer cells

    • Syahadatain Nor Haerani
    • Achara Raksat
    • Khanitha Pudhom

    Note 09 March 2021 Pages: 670 - 674

    

24. Identification of pheophorbide a as an inhibitor of receptor for advanced glycation end products in Mallotus japonicus

    • Teruki Matsumoto
    • Michiyo Matsuno
    • Hajime Mizukami

    Note 24 February 2021 Pages: 675 - 681

    

25. Five matrine-type alkaloids from Sophora tonkinensis

    • Qing Tang
    • Ding Luo
    • Yao-Lan Li

    Note 03 March 2021 Pages: 682 - 687

    

26. Quantification of ustalic acid, a chemotaxonomic marker, in Tricholoma ustale using liquid chromatography–mass spectrometry

    • Tetsuro Ito
    • Hiroyuki Nagai
    • Hirofumi Konishi

    Rapid Communication 27 February 2021 Pages: 688 - 691

    

27. Quality evaluation of Pinellia tuber by LC-TOF/MS targeted to ephedrine

    • Tadahiro Yahagi
    • Toshiyuki Atsumi
    • Keiichi Matsuzaki

    Natural Resource Letter 31 January 2021 Pages: 692 - 698

    

28. Identification of Valeriana fauriei and other Eurasian medicinal valerian by DNA polymorphisms in psbA–trnH intergenic spacer sequences in chloroplast DNA

    • Taichi Fujii
    • Takako Mori
    • Motoyasu Minami

    Natural Resource Letter 25 February 2021 Pages: 699 - 706

29. One-pot discriminant LC/MS quantitative analysis of ephedrine and pseudoephedrine using Finger Masher and their distribution in the aerial stems of Ephedra plants

    • Hiroyuki Fuchino
    • Osamu Iida
    • Kayo Yoshimatsu

    Natural Resource Letter 18 February 2021 Pages: 707 - 716

    

30. Identification of herbal components as TRPA1 agonists and TRPM8 antagonists

    • Sho Sanechika
    • Chika Shimobori
    • Katsuya Ohbuchi

    Natural Resource Letter 20 April 2021 Pages: 717 - 725

    

31. Correction to: Selective cytotoxicity of epidithiodiketopiperazine DC1149B, produced by marine-derived Trichoderma lixii on the cancer cells adapted to glucose starvation

    • Rui Tang
    • Atsushi Kimishima
    • Masayoshi Arai

    Correction Open access 11 March 2021 Pages: 726 - 726

32. Correction to: Antihypertensive constituents in Sanoshashinto

    • Jianbo Wu
    • Souichi Nakashima
    • Hisashi Matsuda

    Correction Open access 06 March 2021 Pages: 727 - 727

33. Correction to: The acrid raphides in tuberous root of Pinellia ternata have lipophilic character and are specifically denatured by ginger extract

    • Tsukasa Fueki
    • Koichiro Tanaka
    • Toshiaki Makino

    Correction Open access 06 March 2021 Pages: 728 - 728