anhydrohexose deoxyketohexose ascopyrone P (2S)-5-hydroxy-2-(hydroxymethyl)-2,3-dihydro-4H-pyran-4-one 1,5-anhydro-4-deoxy-D-glycero-hex-1-en-3-ulose 144.042 144.12530 A 4-pyranone with a 2,3-double bond carrying a hydroxy group at position 3 and a hydroxymethyl group at position 6. APP Beilstein:1681204 C6H8O4 CHEBI:50071 InChI=1S/C6H8O4/c7-2-4-1-5(8)6(9)3-10-4/h3-4,7,9H,1-2H2/t4-/m0/s1 OC[C@@H]1CC(=O)C(O)=CO1 PMID:16302767 PMID:16630602 Reaxys:1681204 ZXCYXCIWKAILMP-BYPYZUCNSA-N ascopyrone P chebi_ontology