hydrolase activity, acting on carbon-carbon bonds, in ketonic substances 4,5-9,10-diseco-3-hydroxy-5,9,17-trioxoandrosta-1(10),2-diene-4-oate hydrolase activity https://github.com/geneontology/go-ontology/issues/30193 RHEA:32035 GO:0102296 Catalysis of the reaction: (1E,2Z)-3-hydroxy-5,9,17-trioxo-4,5:9,10-disecoandrosta-1(10),2-dien-4-oate + H2O = 9,17-dioxo-1,2,3,4,10,19-hexanorandrostan-5-oate + (2Z,4Z)-2-hydroxyhexa-2,4-dienoate + H+. MetaCyc:RXN-12718 molecular_function EC:3.7.1.17