gibberellin A12 (1R,4bβ,9aβ)-1,4aα-Dimethyl-11-methylene-7β,8aβ-ethanododecahydro-9H-fluorene-1α,9β-dicarboxylic acid 1β,4aα-Dimethyl-8-methylenegibbane-1α,10β-dicarboxylic acid Gibbane-1,10-dicarboxylic acid, 1,4a-dimethyl-8-methylene-, (1α,4aα,4bβ,10β)- (9CI) GA12 (1R,4aS,4bS,7R,9aR,10S,10aS)-1,4a-dimethyl-8-methylenedodecahydro-1H-7,9a-methanobenzo[a]azulene-1,10-dicarboxylic acid