title: Tricalysiamides A-D, diterpenoid alkaloids from Tricalysia dubia.
abstract: Four rearranged ent-kaurane diterpenoid alkaloids, tricalysiamides A-D (1-4), having a cafestol-type carbon framework were isolated from the wood of Tricalysia dubia. Their absolute structures were determined on the basis of 2D NMR spectroscopy, X-ray crystallographic analysis, and chemical methods.
authors.affiliation: School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Nishimura
authors.forename: Yukio
authors.initials: Y
authors.lastname: Hitotsuyanagi
authors.forename: Noriko
authors.initials: N
authors.lastname: Sugeta
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Fukaya
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Aoyagi
authors.forename: Tomoyo
authors.initials: T
authors.lastname: Hasuda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kinoshita
authors.forename: Koichi
authors.initials: K
authors.lastname: Takeya
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D018360:Crystallography, X-Ray; D045786:Diterpenes, Kaurane / Q000737:chemistry / Q000302:isolation & purification*; D007564:Japan; D008968:Molecular Conformation; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D019666:Rubiaceae / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D045786:Diterpenes, Kaurane