(3S,4R)-1,3,4,5-tetrahydroxypentan-2-one 60299-43-6 CHEBI:17140 D-Xul D-threo-pent-2-ulose XUL 1-Deoxy-2-pentulose 1-Deoxy-D-threo-2-pentulose D-threo-2-Pentulose, 1-deoxy- Deoxyxylulose