is tautomer of uracil pyrimidone (4S)-4-hydroxy-3,4-dihydropyrimidin-2(1H)-one (4S)-4-hydroxy-3,4-dihydropyrimidin-2(1H)-one 0 114.043 114.10272 4-HYDROXY-3,4-DIHYDRO-1H-PYRIMIDIN-2-ONE C4H6N2O2 CHEBI:43254 DEAAWXYGBWCVJW-VKHMYHEASA-N InChI=1S/C4H6N2O2/c7-3-1-2-5-4(8)6-3/h1-3,7H,(H2,5,6,8)/t3-/m0/s1 PDBeChem:HPY [H]O[C@]1([H])N([H])C(=O)N([H])C([H])=C1[H] chebi_ontology