Synonyms: 4aa,4bb-Gibbane-1a,10b-dicarboxylic acid, 2b,4a,7-trihydroxy-1,8-dimethyl-,1,4a-lactone (8CI); Gibberellic acid, tetrahydro- (6CI,7CI);4a,1-(Epoxymethano)-7,9a-methanobenz[a]azulene, gibbane-1,10-dicarboxylic acidderiv.; Dihydrogibberellin A1; Gibberellin A1, dihydro-