从黄鞘蕊花(Coleus xanthanthus C. Y. Wuet Y. C. Huang)中分得8种成分。其中1个是新的醌式二萜,命名为黄鞘蕊花甲素,其结构为17-methyl(15→16)abieo-16-methoxy-2α-acetoxy-coleon U.7个已知化合物。coleon U(2),sugiol(3),β—谷甾醇,胡萝卜甙,三十三烷醇,三十三烷和二十八烷酸。
A new eremophilane sesquiterpenoid, along with two known ones, was isolated from the ethyl acetate soluble fraction of the aerial part of Coleus xanthanthus C. Y. Wu et Y. C. Huang. Their structures were elucidated as 4,5,11_trimethyl_8,9_seco_1(10),7(11)_eremophiladien_8,12_olid_9_oic acid (1), 2,9_dioxoeuryopsin (2) and 9_oxoeuryopsin (3) by spectral methods. The 1H_NMR and 13 C NMR data of compounds 1, 2 and 3 were unambiguously assigned on the basis of two_dimensional NMR spectroscopy.
