title: Diterpenoids from Calceolaria inamoena.
abstract: Four 9-epi-ent-labdanes were isolated from the aerial parts of Calceolaria inamoena. Their structures, 2beta-hydroxy-9-epi-ent-labda8(17)-13(E)dien-15-oic acid, 2beta-hydroxy-9-epi-ent-labda8(17)-13(Z)dien-15-oic acid, 2beta-hydroxy-9-epi-ent-labda8(17)-13(E)dien-15-al and 2beta-hydroxy-9-epi-ent-labda-8(17)-13(Z)dien-15-al, were established by spectroscopic methods including by analysis of 2 dimensional heteronuclear correlation experiments 1H/13C (normal and long range), and NOE and gs-sel-1D-NOESY and TOCSY of their methyl ester or acetyl derivatives.
authors.affiliation: Departamento de Química, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile. juan.garbarino@usm.cl
authors.forename: Juan A
authors.initials: JA
authors.lastname: Garbarino
authors.forename: María Cristina
authors.initials: MC
authors.lastname: Chamy
authors.forename: Marisa
authors.initials: M
authors.lastname: Piovano
authors.forename: Luis
authors.initials: L
authors.lastname: Espinoza
authors.forename: Eliana
authors.initials: E
authors.lastname: Belmonte
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D035261:Plant Components, Aerial / Q000737:chemistry; D028083:Scrophulariaceae / Q000737:chemistry*
chemical_list: D004224:Diterpenes