an N-(36-hydroxyhexatriacontenoyl)-sphing-4-enine + a (9Z,12Z)-octadecadienoyl-containing triacyl-sn-glycerol = an N-(36-(9Z,12Z-octadecadienoyloxy)-hexatriacontenoyl)-sphing-4-enine + a diacylglycerol — reaction