has role saturated fatty acyl-L-carnitine O-palmitoyl-L-carnitine An O-acyl-L-carnitine in which the acyl group is specified as palmitoyl (hexadecanoyl). long-chain fatty acyl-L-carnitine EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor O-palmitoylcarnitine mouse metabolite human metabolite