7-hydroxy-1ξ,8ξ-dimethyl-2-oxo-4aβ,7β-gibbane-10β-carboxylic acid

ent-13-acetoxy-3α,10β-dihydroxy-16-oxo-17,20-dinorgibberell-1-ene-7,19-dioic acid 7-methyl ester 19,10-lactone

ent-1β,13-dichloro-10β-hydroxy-7-methoxycarbonyl-20-norgibberella-2,16-dien-19-oic acid 19,10β-lactone

4β-chloro-7-(4-chloro-n-butoxy)-10β-methoxycarbonyl-1β-methyl-8-methylenegibb-2-ene-1α,4aα-carbolactone

ent-1α,10β,13-trihydroxy-20-norgibberella-2,16-diene-7,19-dioic acid 19,10β-lactone 7-methyl ester