gibberellin A(19)

Bamboo gibberellin

4aα-Formyl-7-hydroxy-1β-methyl-8-methylenegibbane-1α,10β-dicarboxylic acid

(4bβ)-4aα-Formyl-7-hydroxy-1-methyl-8-methylenegibbane-1α,10β-dicarboxylic acid