title: Three new taxoids from the seeds of Japanese yew, Taxus cuspidata.
abstract: Five taxane diterpenoids were isolated from the seeds of the Japanese yew, Taxus cuspidata Sieb. et Zucc. The structures were established as 2 alpha,7 beta,13 alpha-triacetoxy-5 alpha-(3'-dimethylamino-3'-phenyl)-propionyloxy-2(3-->20)-aboe+ ++-taxa-9,10-dione (1) and 2 alpha,7 beta,9 alpha,10 beta-tetraacetoxy-5 alpha-[(2R,3S),N,N-dimethyl-3-phenylisoseryloxy]-taxa-4(20),11- dien-13-one (2), 2 alpha, 9 alpha, 10 beta-triacetoxy-5 alpha-cinnamoxy-taxa-4(20),11-diene-13 alpha-ol (3), taxezopidine J (4), and taxuspine D (5) on the basis of 1D, 2D NMR, and MS spectral analysis. Compounds 1, 2, and 3 are new compounds.
authors.forename: Q W
authors.initials: QW
authors.lastname: Shi
authors.forename: T
authors.initials: T
authors.lastname: Oritani
authors.forename: D
authors.initials: D
authors.lastname: Zhao
authors.forename: R
authors.initials: R
authors.lastname: Murakami
authors.forename: T
authors.initials: T
authors.lastname: Oritani
mesh_terms: D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D012639:Seeds / Q000737:chemistry*; D014197:Trees / Q000737:chemistry* / Q000196:embryology
chemical_list: D004224:Diterpenes