is enantiomer of L-fructose keto-fructose keto-L-fructose 180.063 180.15588 BJHIKXHVCXFQLS-FUTKDDECSA-N Beilstein:1724560 C6H12O6 CHEBI:37724 InChI=1S/C6H12O6/c7-1-3(9)5(11)6(12)4(10)2-8/h3,5-9,11-12H,1-2H2/t3-,5-,6-/m0/s1 OC[C@H](O)[C@H](O)[C@@H](O)C(=O)CO chebi_ontology keto-L-fructose keto-D-fructose