label: phosphoenolpyruvate + UDP-N-acetyl-alpha-D-glucosamine => UDP-N-acetyl-3-O-(1-carboxyvinyl)-alpha-D-glucosamine + phosphate
label_lc: phosphoenolpyruvate + udp-n-acetyl-alpha-d-glucosamine => udp-n-acetyl-3-o-(1-carboxyvinyl)-alpha-d-glucosamine + phosphate