title: Crotofolane diterpenoids from Croton caracasanus.
abstract: Four new crotofolane-type diterpenoids, crotocarasin (A-D) (1-4), together with the known crotofolin E, were isolated from a dichloromethane extract of the stems of Croton caracasanus Pittier. The structures of the new compounds were determined by spectroscopic methods, and the structure of 3 was further confirmed by single-crystal X-ray data analyses.
authors.affiliation: Universidad Central de Venezuela, Caracas, Venezuela.
authors.forename: Katiuska
authors.initials: K
authors.lastname: Chávez
authors.affiliation: Escuela de Quimica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela.
authors.forename: Reinaldo S
authors.initials: RS
authors.lastname: Compagnoneb
authors.affiliation: Real Jardín Botánico, RJB-CSIC, Plaza Murillo 2, Madrid 28014, Spain.
authors.forename: Ricarda
authors.initials: R
authors.lastname: Riina
authors.affiliation: Centro de Quimica, Instituto Venezolano de Investigaciones Cientificas (IVIC), Caracas, Venezuela.
authors.forename: Alexander
authors.initials: A
authors.lastname: Briceño
authors.affiliation: Centro de Quimica, Instituto Venezolano de Investigaciones Cientificas (IVIC), Caracas, Venezuela.
authors.forename: Teresa
authors.initials: T
authors.lastname: González
authors.affiliation: Escuela de Quimica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela.
authors.forename: Emilio
authors.initials: E
authors.lastname: Squitieri
authors.affiliation: Escuela de Quimica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela.
authors.forename: Carlos
authors.initials: C
authors.lastname: Landaetab
authors.affiliation: Centro de Quimica, Instituto Venezolano de Investigaciones Cientificas (IVIC), Caracas, Venezuela.
authors.forename: Humberto
authors.initials: H
authors.lastname: Soscrún
authors.affiliation: Universidad Central de Venezuela, Caracas, Venezuela.
authors.forename: Alírica I
authors.initials: AI
authors.lastname: Suáreza
mesh_terms: D029802:Croton / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure
chemical_list: D004224:Diterpenes