Synonyms: (3-Carboxy-2-hydroxypropyl)trimethylammoniumhydroxide, inner salt, butyrate (7CI); Ammonium,(3-carboxy-2-hydroxypropyl)trimethyl-, hydroxide, inner salt, butyrate (8CI);Butyric acid, ester with (3-carboxy-2-hydroxypropyl)trimethylammoniumhydroxide, inner salt (8CI); (?à)-Butyrylcarnitine; Butyryl-DL-carnitine