The molecule is an O-hydroxybutyryl-L-carnitine in which the acyl group is specified as 3-hydroxybutyryl. It is an O-hydroxybutyryl-L-carnitine and a hydroxy-fatty acyl-L-carnitine. It derives from a 3-hydroxybutyric acid.
(3R)-3-(3-hydroxybutanoyloxy)-4-(trimethylazaniumyl)butanoate