title: Seco-terpenoids and other constituents from Elateriospermum tapos.
abstract: Two new taraxerane triterpenes, 2,3-seco-taraxer-14-ene-2,3,28-trioic acid 2,3-dimethyl ester ( 1) and 2,3-seco-taraxer-14-ene-2,3,28-trioic acid 3-methyl ester ( 2), along with two known triterpenes, hopenol B and aleuritolic acid, and five known flavonoids, putraflavone, kaempferol, sequoiaflavone, amentoflavone, and ginkgetin, were isolated from the leaves of Elateriospermum tapos. The stem extract yielded a new cleistanthane diterpene, 2,3-seco-sonderianol ( 3), three known triterpenes, lupeol, lupeol acetate, and 3-acetylaleuritolic acid, and three known diterpenes, yucalexin B-22, yucalexin P-15, and yucalexin P-17. The structures of these compounds were established on the basis of their spectroscopic data. Compound 1 was cytotoxic against NCI-H187 and BC cell lines and also showed in vitro antimycobacterial activity against Mycobacterium tuberculosis.
authors.affiliation: Department of Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Duangpen
authors.initials: D
authors.lastname: Pattamadilok
authors.forename: Rutt
authors.initials: R
authors.lastname: Suttisri
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D006801:Humans; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D010946:Plants, Medicinal / Q000737:chemistry*; D027544:Salvia / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013785:Thailand; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: C528207:2,3-seco-taraxer-14-ene-2,3,28-trioic acid 2,3-dimethyl ester; C528208:2,3-seco-taraxer-14-ene-2,3,28-trioic acid 3-methyl ester; D000972:Antineoplastic Agents, Phytogenic; D000995:Antitubercular Agents; D005419:Flavonoids; D013729:Terpenes; D014315:Triterpenes