(S)-carnitine 3-carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium 541-15-1 Ammonium, (3-carboxy-2-hydroxypropyl)trimethyl-, hydroxide,inner salt CARNITINE L-carnitine L-gamma-trimethyl-beta-hydroxybutyrobetaine R-(-)-3-hydroxy-4-trimethylaminobutyrate bicarnesine carnitine (L-form) vitamin B T vitamin BT