title: Labdane diterpenes from Aster spathulifolius and their cytotoxic effects on human cancer cell lines.
abstract: Three new labdane diterpenes (1-3), together with eight known diterpenoids, were isolated from a methanol extract of the aerial parts of Aster spathulifolius. The structures of 1-3 were determined as (13R)-labda-7,14-diene 13-O-beta-d-(4'-O-acetyl)fucopyranoside (1), (13R)-labda-7,14-diene 13-O-beta-d-(3'-O-acetyl)fucopyranoside (2), and (13R)-labda-14(15)-en-8,13-diol 13-O-beta-d-fucopyranoside (3), on the basis of spectroscopic and chemical methods. Compounds 1, 2, and four of the known compounds exhibited generally nonspecific cytotoxicity against human A549, SK-OV-3, SK-MEL-2, XF498, and HCT15 tumor cells.
authors.affiliation: College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea, Korea Research Institute of Chemical Technology, Taejeon 305-600, Korea.
authors.forename: Sung Ok
authors.initials: SO
authors.lastname: Lee
authors.forename: Sang Zin
authors.initials: SZ
authors.lastname: Choi
authors.forename: Sang Un
authors.initials: SU
authors.lastname: Choi
authors.forename: Kang Choon
authors.initials: KC
authors.lastname: Lee
authors.forename: Young Won
authors.initials: YW
authors.lastname: Chin
authors.forename: Jinwoong
authors.initials: J
authors.lastname: Kim
authors.forename: Young Choong
authors.initials: YC
authors.lastname: Kim
authors.forename: Kang Ro
authors.initials: KR
authors.lastname: Lee
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D031173:Aster Plant / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007723:Korea; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes