1'-[1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phospho]-3'-[1-(9Z-octadecenoyl)-2-hexadecanoyl-sn-glycero-3-phospho]-glycerol + 1-hexadecanoyl-sn-glycero-3-phosphocholine = 1'-[1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phospho]-3'-[1-(9Z-octadecenoyl)-sn-glycero-3-phospho]-glycerol + 1,2-dihexadecanoyl-sn-glycero-3-phosphocholine — reaction