title: Novel bis(monoterpenoid) indole alkaloids from Psychotria bahiensis.
abstract: Two new bis(monoterpenoid) indole alkaloid glucosides, bahienoside A (1) and bahienoside B (2), together with five known compounds, 5alpha-carboxystrictosidine, angustine, strictosamide, and (E)- and (Z)-vallesiachotamine, were isolated from the aerial parts of Psychotria bahiensis collected in Trinidad, West Indies. The structures of the compounds were elucidated using 1D and 2D NMR spectral methods, viz., (1)H, (13)C, (13)C DEPT, (1)H-(1)H COSY, HSQC, HMQC, HMBC, and TOCSY aided by IR, UV, and circular dichroism measurements.
authors.affiliation: Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad, West Indies.
authors.forename: J H A
authors.initials: JH
authors.lastname: Paul
authors.forename: A R
authors.initials: AR
authors.lastname: Maxwell
authors.forename: W F
authors.initials: WF
authors.lastname: Reynolds
mesh_terms: D000107:Acetylation; D026121:Indole Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D039821:Monoterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D019666:Rubiaceae / Q000737:chemistry*; D013237:Stereoisomerism; D014300:Trinidad and Tobago
chemical_list: D026121:Indole Alkaloids; D039821:Monoterpenes; C478438:bahienoside A; C478439:bahienoside B