HETEROCYCLES

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

■ Dragon’s Blood from Dracaena draco, Structure of Novel Homoisoflavanoids

Lorenzo Camarda, Lucio Merlini, and Gianluca Nasini

*CNR, Centro Studio Sostanze Organiche Naturali, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

Abstract

Two novel homoisoflavans, 4’,7-dihydroxy- (4) and 4’,7-dihydroxy-8-methoxy- (5), were isolated from the resin “Dragon’s blood”, which is produced by Dracaena draco (Liliaceae). In the same resin were also identified 4’,7-dihydroxy- and 4’,5,7-trihydroxy-6-methylhomoisoflavanones (1) and (3), together with (2S)-4’,7-dihydroxy-3’-methoxy-8-methylflavan (8), (2S)-4’,5-dihydroxy-7-methoxy-8-methylflavan (9) and 3,4’-dihydroxy-7-methoxyflavone (10). Their structures were established on the basis of spectroscopic analysis and by synthesis.