In addition to trans-communol and trans-communic acid (obtained in the form of the methyl ester), seven new diterpenoids were isolated as non basic constituents from fresh bulbs of Fritillaria thunbergii MIQ. (Liliaceae). Their structures were determined to be isopimaran-19-ol (3), isopimaran-19-oic acid [obtained in the form of the methyl ester (4)], ent-kauran-16β, 17-diol (5), ent-kauran-16α, 17-diol (6), ent-16β, 17-epoxy-kaurane (7), ent-16α-methoxy-kauran-17-ol (8), and ent-kaur-15-en-17-ol (9).
除了反式
厚朴酚和反式厚朴酸(以甲基酯的形式获得)外,还从新鲜的 Fritillaria thunbergii MIQ.(百合科)的新鲜鳞茎中分离出了七种新的二
萜类非碱性成分。它们的结构被确定为异马兰-19-醇(3)、异马兰-19-酸[以甲酯形式获得(4)]、ent-kauran-16β,17
-二醇(5)、ent-kauran-16α,17
-二醇(6)、ent-16β,17-环氧-kaurane(7)、ent-16α-甲氧基-kauran-17-醇(8)和ent-kaur-15-烯-17-醇(9)。