title: Cycloartanes from the red alga Galaxaura sp.
abstract: Six cycloartane triterpenes have been isolated from the red alga Galaxaura sp. The new structures (galaxaurols A-E) were determined to be methyl 3beta-hydroxy-23-oxocycloart-24-en-29-oate (2), methyl 23(E)-3beta-hydroxy-25-methoxycycloart-23-en-29-oate (3), methyl 23(E)-3beta-hydroxycycloarta-23,25-dien-29-oate (4), 23(E)-25-methoxycycloart-23-en-3beta,29-diol (5), and cycloart-24-en-3beta,23alpha,29-triol (6), respectively.
authors.affiliation: Hutchison Medipharma Ltd., Shanghai, China.
authors.forename: Wei-Han
authors.initials: WH
authors.lastname: Zhang
authors.forename: Hong-Mao
authors.initials: HM
authors.lastname: Zhong
authors.forename: Chun-Tao
authors.initials: CT
authors.lastname: Che
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D000461:Rhodophyta / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D014315:Triterpenes; C085352:cycloartane