摘要
Four new eremophilane type sesquiterpenes were isolated from the roots of Cacalia roborowskii (Maxim) Ling. Their structures were established as 8-oxo-eremophila-6, 9-dien-12-oic acid (1), 3 beta-acetoxyl-8-oxo-eremophila-6, 9-dien-12-oic acid (2), 3 beta-angeloyoxyl-8-oxo-eremophilad, 9-dien-12-oic acid (3) and 3 beta-(2-methylbutyryloxyl)-8-oxo-eremophilia-6,9-dien-12-oic acid (4) by means of 1D and 2D NMR spectroscopy.
Four new eremophilane type sesquiterpenes were isolated from the roots of Cacalia roborowskii (Maxim) Ling. Their structures were established as 8-oxo-eremophila-6, 9-dien-12-oic acid (1), 3 beta-acetoxyl-8-oxo-eremophila-6, 9-dien-12-oic acid (2), 3 beta-angeloyoxyl-8-oxo-eremophilad, 9-dien-12-oic acid (3) and 3 beta-(2-methylbutyryloxyl)-8-oxo-eremophilia-6,9-dien-12-oic acid (4) by means of 1D and 2D NMR spectroscopy.
