1,3-biphosphoglycerate 1,3-bis-phosphoglycerate 1,3-diphosphateglycerate 1,3-diphosphoglycerate 13-DPG 1981-49-3 3-P-glyceroyl-P 3-phospho-D-glyceroyl-phosphate 3-phosphoglyceroyl-P 3-phosphoglyceroyl-phosphate DPG P-glyceroyl-P glycerate 1,3-biphosphate glycerate 1,3-bisphosphate glycerate 1,3-diphosphate phosphoglyceroyl-P