Abstract
A new diterpenoid, fritillebic acid (1) and four new diterpenoid dimers, fritillebins A (2) and B (3), and fritillebinides A and B, were isolated from a crude drug, bulds of Fritillaria ebeiensis G. D. Yu et G. Q. JI. The structures of compounds 1-3 were determined to be ent-3β-acetoxy-16β-kauran-17-oic acid (1), ent-16β-hydroxykauran-17-yl ent-3β-acetoxy-16β-kauran-17-oate (2), and ent-3β-acetoxy-16β-hydroxykauran-17-yl ent-3β-acetoxy-16β-kauran-17-oate (3), respectively, on the basis of spectroscopic and chemical evidence.
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