title: Tirucallane triterpenes from the roots of Ozoroa insignis.
abstract: Eight tirucallane triterpenes, methyl 3alpha,24S-dihydroxytirucalla-8,25-dien-21-oate (2), methyl 3alpha-hydroxy-24-oxotirucalla-8,25-dien-21-oate (3), methyl 3alpha-hydroxy-25,26,27-trinor-24-oxotirucall-8-en-21-oate (4), 3alpha,25-dihydroxy-24-(2-hydroxyethyl)-tirucall-8-en-21-oic acid (5), 3alpha,24S,25-trihydroxytirucall-8-en-21-oic acid (6), 3alpha,24R,25-trihydroxytirucall-8-en-21-oic acid (7), 3alpha,25-dihydroxytirucall-8-en-21-oic acid (8), and methyl 3alpha,25-dihydroxytirucall-8-en-21-oate (9), together with alpha-elemolic acid methyl ester (1), were isolated from the roots of Ozoroa insignis. Their structures were elucidated on the basis of spectroscopic evidence.
authors.affiliation: Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510-301, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Liu
authors.forename: Pedro
authors.initials: P
authors.lastname: Abreu
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010936:Plant Extracts; D014315:Triterpenes