has functional parent has parent hydride progesterone Delta(1)-progesterone Beilstein:1999508 chebi_ontology 1,2-dehydroprogesterone C21H28O2 3,20-dioxo-1,4-pregnadiene CAS:1162-54-5 312.44582 delta1-Progesterone [H][C@@]12CCC3=CC(=O)C=C[C@]3(C)[C@@]1([H])CC[C@]1(C)[C@H](CC[C@@]21[H])C(C)=O 3,20-dioxo-pregna-1,4-diene InChI=1S/C21H28O2/c1-13(22)17-6-7-18-16-5-4-14-12-15(23)8-10-20(14,2)19(16)9-11-21(17,18)3/h8,10,12,16-19H,4-7,9,11H2,1-3H3/t16-,17+,18-,19-,20-,21+/m0/s1 312.20893 1,2-didehydroprogesterone KEGG:C14677 pregna-1,4-diene-3,20-dione A 3-oxo Delta(4)-steroid that is progesterone which has been oxidised to introduce a double bond between positions 1 and 2. QIEPWCSVQYUPIY-LEKSSAKUSA-N 1-Dehydroprogesterone Pregna-1,4-diene-3,20-dione 0 Reaxys:1999508 CHEBI:34073 steroid fundamental parent 20-oxo steroid 3-oxo-Delta(1),Delta(4)-steroid