label: a 1-O-alkyl-2-acetyl-sn-glycerol + a 1,2-diacyl-sn-glycero-3-phosphocholine <=> a 1-O-alkyl-2-acetyl-3-acyl-sn-glycerol + a 1-acyl-sn-glycero-3-phosphocholine
label_lc: a 1-o-alkyl-2-acetyl-sn-glycerol + a 1,2-diacyl-sn-glycero-3-phosphocholine <=> a 1-o-alkyl-2-acetyl-3-acyl-sn-glycerol + a 1-acyl-sn-glycero-3-phosphocholine