label: 1-hexadecanoyl-N-(acetyl)-sphing-4-enine + 1-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine => 1-(9Z-octadecenoyl)-2-hexadecanoyl-sn-glycero-3-phosphocholine + N-(acetyl)-sphing-4-enine
label_lc: 1-hexadecanoyl-n-(acetyl)-sphing-4-enine + 1-(9z-octadecenoyl)-sn-glycero-3-phosphocholine => 1-(9z-octadecenoyl)-2-hexadecanoyl-sn-glycero-3-phosphocholine + n-(acetyl)-sphing-4-enine