title: Two new triterpenoids from the resin of Boswellia carterii.
abstract: Two new triterpenoids, 3-oxotirucalla-7,9(11),24-trien-21-oic acid (1) and 18Hα,3β,20β-ursanediol (2), along with 15 known triterpenes, α-amyrin, α-boswellic acid, β-boswellic acid, acetyl α-boswellic acid, acetyl β-boswellic acid, 9,11-dehydro-β-boswellic acid, 9,11-dehydro-α-boswellic acid, acetyl 11α-methoxy-β-boswellic acid, 11-keto-β-boswellic acid, acetyl 11-keto-β-boswellic acid, acetyl α-elemolic acid, 3β-hydroxytirucalla-8,24-dien-21-oic acid, elemonic acid, 3α-hydroxytirucalla-7,24-dien-21-oic acid, and 3α-hydroxytirucall-24-en-21-oic acid, were isolated from the resin of Boswellia carterii Birdw.
authors.affiliation: College of Traditional Chinese Materia Medica, Guangdong Pharmaceutical University, Guangzhou, China. wfeng1230@163.com
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Zhan-Lin
authors.initials: ZL
authors.lastname: Li
authors.forename: Hong-Hua
authors.initials: HH
authors.lastname: Cui
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Hua
authors.forename: Yong-Kui
authors.initials: YK
authors.lastname: Jing
authors.forename: Sheng-Wang
authors.initials: SW
authors.lastname: Liang
mesh_terms: D029743:Boswellia / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012116:Resins, Plant / Q000737:chemistry; D013237:Stereoisomerism; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C447943:11-keto-boswellic acid; C558099:18Halpha,3beta,20beta-ursanediol; C459792:3-O-acetyl-beta-boswellic acid; C558098:3-oxotirucalla-7,9(11),24-trien-21-oic acid; D004365:Drugs, Chinese Herbal; D012116:Resins, Plant; D014315:Triterpenes; C054625:boswellic acid