title: Two new triterpenoids from Photinia serrulata.
abstract: Two new triterpenoids, 2alpha,3beta,11alpha,13beta-tetrahydroxy-12-ketooleanan-28-oic acid(1) and 3beta-hydroxy-12-keto-9(11)-ursen-28,13beta-olide (2) were isolated from the leaves ofPhotinia serrulata. Their structures were identified by spectral methods. Compounds 1 and2 were assessed for cytotoxic activity against three human tumor cell lines (A-549, HCT-8,and BEL-7402), and they showed no cytotoxic effects at concentrations up to 5microg/mL.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China.
authors.forename: Yaling
authors.initials: Y
authors.lastname: Song
authors.forename: Yuehu
authors.initials: Y
authors.lastname: Wang
authors.forename: Qing
authors.initials: Q
authors.lastname: Lu
authors.forename: Jinming
authors.initials: J
authors.lastname: Gao
authors.forename: Minggang
authors.initials: M
authors.lastname: Bi
authors.forename: Yongxian
authors.initials: Y
authors.lastname: Cheng
mesh_terms: D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D046936:Photinia / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D014315:Triterpenes