title: Two new triterpenoids from the resin of Styrax tonkinensis.
abstract: Two new triterpenoids, 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide (1) and 3-oxo-olean-11,13(18)-dien-28,19β-olide (2) were isolated from the resin of Styrax tonkinensis (Pier.) Craib. The structures of both triterpenoids were determined by physicochemical and spectroscopic methods. Compound 1 is the second triterpene found with cis-fused C/D ring from the resin, which is rarely observed in oleanane-type triterpenes.
authors.affiliation: a College of Traditional Chinese Materia Medica, Guangdong Pharmaceutical University, and the Key Unit of Chinese Medicine Digitalization Quality Evaluation of SATCM , Guangzhou 510006 , China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Yi-Bo
authors.initials: YB
authors.lastname: Wang
authors.forename: Huan
authors.initials: H
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Sheng-Wang
authors.initials: SW
authors.lastname: Liang
authors.forename: Shu-Mei
authors.initials: SM
authors.lastname: Wang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D012116:Resins, Plant / Q000737:chemistry*; D032362:Styrax / Q000737:chemistry*
chemical_list: C000602487:3-oxo-olean-11,13(18)-dien-28,19beta-olide; C000602486:3beta,6beta-dihydroxy-12-oxo-13Halpha-olean-28,19beta-olide; D004365:Drugs, Chinese Herbal; D012116:Resins, Plant; D009828:Oleanolic Acid
keywords: 3-oxo-olean-11,13(18)-dien-28,19β-olide; 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide; Styrax tonkinensis; triterpenoids