The molecule is a C19-gibberellin, initially identified in Helianthus annuus. It differs from gibberellin A1 in the absence of an OH group at C-2 and the presence of a beta-OH at C-9 (all gibbane numbering). It has a role as a plant metabolite. It is a C19-gibberellin, a gibberellin monocarboxylic acid and a lactone.
(1R,2R,5S,7S,8R,9S,10R,11R)-5,7-dihydroxy-11-methyl-6-methylidene-16-oxo-15-oxapentacyclo[9.3.2.15,8.01,10.02,8]heptadecane-9-carboxylic acid