obsolete gibberellin-15(closed lactone form),2-oxoglutarate:oxygen oxidoreductase (3beta-hydroxylating) activity (obsolete GO:0102755)
OBSOLETE. Catalysis of the reaction: gibberellin A15 (closed lactone form) + O2 + 2-oxoglutarate = gibberellin A37 (closed lactone form) + succinate + carbon dioxide.