Reaction catalyzed by 4,5:9,10-diseco-3-hydroxy-5,9,17-trioxoandrosta-1(10),2-diene-4-oate hydrolase (3.7.1.17)

		+		H2O	=			+
	4,5-9,10-diseco-3-hydroxy-5,9,17-tri-oxoandrosta-1(10),2-diene-4-oic acid	+		H2O	=		9,17-dioxo-1,2,3,4,10,19-hexanorandrostan-5-oic acid	+		2-hydroxy-hexa-2,4-dienoic acid