title: Crotocascarins I-K: Crotofolane-Type Diterpenoids, Crotocascarin γ, Isocrotofolane Glucoside and Phenolic Glycoside from the Leaves of Croton cascarilloides.
abstract: From the 1-BuOH-soluble fraction of a methanol (MeOH) extract of the leaves of Croton cascarilloides, crotofolanes: crotocascarins I-K, nor-crotofolane: crotocascarin γ, isocrotofolane glucoside and phenolic glycoside were isolated by a combination of various separation techniques. Their structures were elucidated mainly from the NMR spectroscopic evidence. The structure of crotocascarin K was first elucidated by spectroscopic analysis and then was confirmed by X-ray crystallographic analysis. Its absolute structure was finally determined by the modified Mosher's method. Isocrotofolane glucoside was found to possess a new skeleton, however, its absolute structure remains to be determined.
authors.affiliation: Department of Natural Products Chemistry, Faculty of Pharmacy, Yasuda Women's University.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kawakami
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
authors.forename: Masanori
authors.initials: M
authors.lastname: Inagaki
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takeda
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Kawahata
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamaguchi
mesh_terms: D029802:Croton / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D008958:Models, Molecular; D008968:Molecular Conformation; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D005960:Glucosides; D006027:Glycosides