(3S,4S)-1,3,4,5-tetrahydroxypentan-2-one X0751_SIGMA L-erythro-2-Pentulose L-erythro-2-Pentulose (9CI) L-erythro-Pentulose (7CI,8CI) CHEBI:16880 L-Rul L-erythro-pent-2-ulose