The molecule is an O-acyl-L-carnitine that is L-carnitine having a 3-methylglutaryl group as the acyl substituent It is an O-3-methylglutarylcarnitine and an O-acyl-L-carnitine.
(3R)-3-(4-carboxy-3-methylbutanoyl)oxy-4-(trimethylazaniumyl)butanoate