Four ent-kaurane-type diterpenoids from Croton tonkinensis Gagnep.
From the leaves of the endemic Vietnamese medicinal plant Croton tonkinensis GAGNEP. (Euphorbiaceae) the four new ent-kaurane-type diterpenoids ent-1alpha,14alpha-diacetoxy-7beta-hydroxykaur-16-en-15-one (1), ent-1alpha,7beta-diacetoxy-14alpha-hydroxykaur-16-en-15-one (2), ent-18-acetoxy-14alpha-hydroxykaur-16-en-15-one (3), and ent-(16S)-18-acetoxy-7beta-hydroxykauran-15-one (4) were isolated. Their structures were elucidated by spectroscopic analyses.
Giang
Phan Minh
PM
Faculty of Chemistry, College of Natural Science, Vietnam National University, Hanoi.
Son
Phan Tong
PT
Lee
Jung Joon
JJ
Otsuka
Hideaki
H
D029802:Croton; D045786:Diterpenes, Kaurane / Q000737:chemistry* / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves
D045786:Diterpenes, Kaurane; D010936:Plant Extracts