On the Structures of the Diterpenes Licamichauxiioic Acids A and B
作者:Braulio M. Fraga、Inmaculada Cabrera、Juan M. Amaro-Luis
DOI:10.1021/np800370f
日期:2008.12.1
The structures of the diterpenes licamichauxiioic acids A and B, isolated from Licania michauxii, which had been reported as 15-oxo-ent-kaur-9(11),16-dien-19-oic acid (1) and 15-oxo-ent-kaur-13,16-dien-19-oic acid (3), respectively, are not correct. Starting from grandiflorenic acid (6) we had prepared a compound with the proposed structure for licamichauxiioic acid A, and its spectroscopic data are