title: Tropane alkaloids from the leaves and stem bark of Erythroxylon alaternifolium and Erythroxylon rotundifolium.
abstract: A novel 3alpha,6beta,7beta-triol tropane alkaloid esterified by two benzoyl residues was isolated from the leaves of the endemic cuban species, Erythroxylon alaternifolium. Another novel 3alpha,6alpha,7beta-triol tropane alkaloid esterified by trimethoxycinnamoyl and trimethoxybenzoyl residues was isolated from the leaves and stem bark of a second endemic cuban species, Erythroxylon rotundifolium. Their structures were elucidated as 3alpha,7beta-dibenzoyloxy-6beta-hydroxy-tropane and 3alpha-(3,4,5-trimethoxycinnamoyloxy)-7beta-(3,4,5- trimethoxybenzoyloxy)-6alpha-hydroxy-tropane by spectroscopic methods including 2D-NMR techniques.
authors.affiliation: Instituto de Ecologia y Sistematica, CITMA, Boyeros, Habana, Cuba.
authors.forename: A L
authors.initials: AL
authors.lastname: Payo-Hill
authors.forename: R S
authors.initials: RS
authors.lastname: Dominguez
authors.forename: M O
authors.initials: MO
authors.lastname: Suarez
authors.forename: M
authors.initials: M
authors.lastname: Batista-Baez
authors.forename: H T
authors.initials: HT
authors.lastname: Castro
authors.forename: L
authors.initials: L
authors.lastname: Rastrelli
authors.forename: R
authors.initials: R
authors.lastname: Aquino
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D019685:Rosales / Q000737:chemistry*; D014326:Tropanes / Q000737:chemistry
chemical_list: D000470:Alkaloids; D014326:Tropanes