label: a 3-acyl-sn-glycero-1-phospho-(3'-acyl-1'-sn-glycerol) + sn-glycero-1-phospho-(1'-sn-glycerol) => 2 a 3-acyl-sn-glycero-1-phospho-(1'-sn-glycerol)
label_lc: a 3-acyl-sn-glycero-1-phospho-(3'-acyl-1'-sn-glycerol) + sn-glycero-1-phospho-(1'-sn-glycerol) => 2 a 3-acyl-sn-glycero-1-phospho-(1'-sn-glycerol)