AMETHYSTONAL AND AMETHYSTONOIC ACID, NEW DITERPENOIDS FROM RABDOSIA AMETHYSTOIDES

Abstract

Abstract: Amethystonal and amethystonoic acid, two New diterpenoids were isolated from Rbdosia amethystoides (Beath.) C. Y. Wu et Hsuen. collected in Xin- Xan, Honan. From spectroscopic evidences and chemical reactions the structures of the amethystonal and amethystonoic acid have been established as ent-7β, 12β, 14α-tri-hydroxy-18-ald-16- (I ) and ent-7β, 12β, 14α- tri--hydroxy-18-Carboxy-16-Kauren (Ⅳ), respectively. These two new compounds (I ) and (Ⅳ) appear to be the first 12-and 18-simultaneously oxy- genated ent-kaurenoids from Rabdosia plants.

Key words: amethystonal, acid, new diterpenoids

Zhao Qingzhi, Chao Jinhua and Wang Hanqing,Sun Handong,Yoshnori Minami. AMETHYSTONAL AND AMETHYSTONOIC ACID, NEW DITERPENOIDS FROM RABDOSIA AMETHYSTOIDES[J]. Plant Diversity, 1983, 5(03): 1-3.

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AMETHYSTONAL AND AMETHYSTONOIC ACID, NEW DITERPENOIDS FROM RABDOSIA AMETHYSTOIDES

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