The molecule is a halo-gibberellin that is gibberellin A9 carrying a chloro substituent at position 3beta (2beta using gibbane skeletal numbering). It derives from a gibberellin A9.
(1R,2R,5R,8R,9S,10R,11R,12S)-12-chloro-11-methyl-6-methylidene-16-oxo-15-oxapentacyclo[9.3.2.15,8.01,10.02,8]heptadecane-9-carboxylic acid