来自番石榴新鲜叶片的两种新三萜类化合物。
Two new triterpenoids from the fresh leaves of Psidium guajava.
作者信息
Begum Sabira, Hassan Syed Imran, Siddiqui Bina S
机构信息
H. E. J. Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, Pakistan.
出版信息
Planta Med. 2002 Dec;68(12):1149-52. doi: 10.1055/s-2002-36353.
Two new triterpenoids, guajavolide (2 alpha,3 beta,6 beta,23-tetrahydroxyurs-12-en-28,20 beta-olide; 1) and guavenoic acid (2 alpha,3 beta,6 beta,23-tetrahydroxyurs-12,20(30)-dien-28-oic acid; 2) along with one known triterpene oleanolic acid (3) were isolated from the fresh leaves of Psidium guajava. Their structure elucidation and stereochemistry were determined by spectroscopic experiments, including 2D-NMR techniques.
从番石榴新鲜叶片中分离出两种新的三萜类化合物，番石榴内酯（2α,3β,6β,23-四羟基乌苏-12-烯-28,20β-内酯；1）和番石榴酸（2α,3β,6β,23-四羟基乌苏-12,20(30)-二烯-28-酸；2），以及一种已知的三萜类化合物齐墩果酸（3）。通过光谱实验，包括二维核磁共振技术，确定了它们的结构解析和立体化学。
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