## Abstract isolation and structure elucidation of trigonoliimines A (Ia), B (Ib), and C (II)
Three New Indole Alkaloids from Trigonostemon lii
โ Scribed by Tan, Cheng-Jian; Di, Ying-Tong; Wang, Yue-Hu; Zhang, Yu; Si, Yi-Kang; Zhang, Qiang; Gao, Suo; Hu, Xu-Jia; Fang, Xin; Li, Shi-Fei; Hao, Xiao-Jiang
- Book ID
- 126062244
- Publisher
- American Chemical Society
- Year
- 2010
- Tongue
- English
- Weight
- 618 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1523-7060
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Three new phenanthrenes, thrigonosomone A (1), 6,9-O-dedimethyltrigonostemone (2), and thrigonosomone B (3) were isolated from Trigonostemon lii. Their structures were elucidated by spectroscopic methods. Thrigonosomone A (1) possessed a novel seven-membered cyclic anhydride moiety, and its relative
## Abstract The three new monoterpenoid indole alkaloids **1**โ**3** were isolated from the stems of __Ervatamia flabelliformis.__ The structures were elucidated on the basis of spectral analysis and chemical derivatization.