Ent-3,4-seco-labdane and ent-labdane diterpenoids from Croton stipuliformis (Euphorbiaceae).
From a methanolic extract of the leaves of Croton stipuliformis, three ent-3,4-seco-labdanes (1-3) and an ent-labdane (4) together with the known compounds 6-hydroxynidorellol (5), maravuic acid, and sitosterol were isolated and identified from their spectroscopic data. The absolute stereochemistry of compound 4 was determined by application of Mosher's method in the NMR tube.
Ramos
Freddy
F
Graduate School of Pharmaceutical Sciences, University of Tokushima, Shomachi 1-78, Tokushima 770-8505, Japan. faramosr@unal.edu.co
Takaishi
Yoshihisa
Y
Kashiwada
Yoshiki
Y
Osorio
Coralia
C
Duque
Carmenza
C
Acuña
Ricardo
R
Fujimoto
Yoshinori
Y
D029802:Croton / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D008958:Models, Molecular; D018515:Plant Leaves / Q000737:chemistry; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification
D004224:Diterpenes; D013729:Terpenes; C433017:labdane