label: (2R)-3-phosphoglycerate + UDP-alpha-D-glucose => (2R)-2-O-(alpha-D-glucopyranosyl)-3-phospho-glycerate + UDP + H(+)
label_lc: (2r)-3-phosphoglycerate + udp-alpha-d-glucose => (2r)-2-o-(alpha-d-glucopyranosyl)-3-phospho-glycerate + udp + h(+)