The molecule is a C20-gibberellin, initially identified in Gibberella fujikuroi. It differs from gibberellin A12 in the presence of a beta-OH at C-2 (gibbane numbering). It is a dicarboxylic acid, a C20-gibberellin and a gibberellin monocarboxylic acid. It is a conjugate acid of a gibberellin A14(2-).
(1R,2S,3S,4S,5S,8S,9S,12R)-5-hydroxy-4,8-dimethyl-13-methylidenetetracyclo[10.2.1.01,9.03,8]pentadecane-2,4-dicarboxylic acid