gibberellin A12

1β,4aα-Dimethyl-8-methylenegibbane-1α,10β-dicarboxylic acid

(1R,4bβ,9aβ)-1,4aα-Dimethyl-11-methylene-7β,8aβ-ethanododecahydro-9H-fluorene-1α,9β-dicarboxylic acid