preferred_name: a 2-acyl-sn-glycero-3-phosphocholine => a 1-acyl-sn-glycero-3-phosphocholine
preferred_name_lc: a 2-acyl-sn-glycero-3-phosphocholine => a 1-acyl-sn-glycero-3-phosphocholine
label: a 2-acyl-sn-glycero-3-phosphocholine => a 1-acyl-sn-glycero-3-phosphocholine
label_lc: a 2-acyl-sn-glycero-3-phosphocholine => a 1-acyl-sn-glycero-3-phosphocholine