Four new polyhydroxylated steroids plaksterols A-D(1-4),together with two known related steroids ergost-7,9(11),22-trien-3β,5a,6a-triol(5)and ergosta-6β-metho
Traditional Chinese medicine(TCM)is a precious treasure of the Chinese nation and has unique advantages in the pre-vention and treatment of diseases.The holisti
Paclitaxel,a tetracyclic diterpenoid compounds,was firstly isolated from the bark of the Pacific yew trees.Currently,as a low toxicity,high efficiency,and broad