Various types of tryptamine-iridoid alkaloids from Palicourea acuminata (=Psychotria acuminata, Rubiaceae)

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• 作者：Andreas Berger ; Hannes Fasshuber ; Johann Schinnerl ; Lothar Brecker ; Harald Greger
• 关键词：Psychotria acuminata ; Palicourea acuminata ; Rubiaceae ; Monoterpene indole alkaloids ; Lagamboside
• 刊名：Phytochemistry Letters
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：5
• 期：3
• 页码：558-562
• 全文大小：226 K

文摘

The novel tryptamine-iridoid alkaloid lagamboside was isolated from the methanolic leaf extracts of Palicourea acuminata (Benth.) Borhidi (=Psychotria acuminata Benth.) collected in Costa Rica. Its structure was determined by extensive NMR experiments and is characterized by an unusual N-glycosylation and an iridoid moiety closely related to the less common vallesiachotamine. The co-occurrence with the rare bahienoside, containing two iridoid moieties, is of chemotaxonomic interest.