title: New triterpenes from a Chinese medicine, goreishi.
abstract: Besides serratagenic acid, three new ursane-type triterpenes, named goreishic acids I (1), II (2), and III (3), were isolated from a Chinese medicine, Goreishi (the feces of Trogopterus xanthipes Milne-Edwards). The structures of 1, 2 and 3 were respectively determined as 2 alpha,3 beta-dihydroxyursa-12,18-dien-28-oic acid, 2 alpha,3 beta-dihydroxy-23-norursa-12,18-dien-28-oic acid and 2 alpha,3 beta-dihydroxy-24-norursa-12,18-dien-28-oic acid on the basis of spectroscopic evidence.
authors.affiliation: Osaka University of Pharmaceutical Sciences, Matsubara, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Numata
authors.forename: C
authors.initials: C
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Miyamoto
authors.forename: M
authors.initials: M
authors.lastname: Yoneda
authors.forename: P M
authors.initials: PM
authors.lastname: Yang
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000494:pharmacology; D051379:Mice; D014315:Triterpenes / Q000032:analysis* / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C064858:goreishic acid I; C064857:goreishic acid II; C064859:serratagenic acid