title: 3alpha-Hydroxytirucalla-7,24-dien-21-oic acid: a triterpene from Protium crenatum Sandwith.
abstract: The crystal structure of the title compound, C30H48O3, a triterpene extracted from the resin of Protium crenatum Sandwith, is reported. The aliphatic acidic side chain is attached to the tirucallene four-ring system on its alpha-face and is extended by 7.248 (5) A in the 'left-hand' orientation.
authors.affiliation: Laboratorio de Cristalografía, Facultad de Ciencias, Departamento de Química, Universidad de Los Andes, Mérida 5101, Venezuela. asiloe@ciens.ula.ve
authors.forename: A J
authors.initials: AJ
authors.lastname: Mora
authors.forename: G
authors.initials: G
authors.lastname: Delgado
authors.forename: G
authors.initials: G
authors.lastname: Díaz de Delgado
authors.forename: A
authors.initials: A
authors.lastname: Usubillaga
authors.forename: N
authors.initials: N
authors.lastname: Khouri
authors.forename: A
authors.initials: A
authors.lastname: Bahsas
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D014197:Trees / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: C431297:3-hydroxytirucalla-7,24-dien-21-oic acid; D010936:Plant Extracts; D014315:Triterpenes