title: [Chemical constituents from leaves of Rhododendron rubiginosum var rubiginosum].
abstract: Thirteen compounds were isolated from the leaves of Rhododendron rubiginosum var. rubiginosum by various chromatographic techniques. On the basis of spectroscopic data, their structures were elucidated as 3,9-dihydroxy-megastigma-5-ene (1), 3 beta-hydroxy-5alpha ,6 alpha-epoxy-7-megastigmen-9-one (2), loliolide (3), ursolic acid(4), 2 alpha, 3 beta-dihydroxy-urs-12-en-28-oic acid (5), 2 alpha, 3 beta,23-trihydroxy-urs-12-en-28-oic acid (6), 7,9-dimethoxyrhododendrol (7), 7-methoxyrhododendrol (8), zingerone (9), isofraxidin (10), scopoletin (11), (+)-pinoresinol (12) and 3'-O-demethylepipinorisenol (13). All compounds were isolated from this plant for the first time, and compounds 1-3, 7-9, and 11-13 were isolated from the genus Rhododendron for the first time.
authors.affiliation: Key Laboratory Incubation Base of Chinese Herbal Medicine Resources System Research and Exploitation, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
authors.forename: Yong-Xun
authors.initials: YX
authors.lastname: Yang
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Yan
authors.forename: Ming
authors.initials: M
authors.lastname: Tao
authors.forename: Qian
authors.initials: Q
authors.lastname: Luo
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Dong
mesh_terms: D009930:Organic Chemicals / Q000032:analysis / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry*; D029793:Rhododendron / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals