N-(30-hydroxytriacontanoyl)-sphing-4-enine + 1,2,3-tri-(9Z,12Z)-octadecadienoylglycerol = N-[30-(9Z,12Z-octadecadienoyloxy)-triacontanoyl]-sphing-4-enine + di-(9Z,12Z)-octadecadienoylglycerol — reaction