The molecule is an ammonium ion resulting from the protonation of the nitrogen of the dimethylaminoethyl substituent of ent-diltiazem. The major species at pH 7.3. It has a role as a potassium channel blocker. It is a conjugate acid of an ent-diltiazem. It is an enantiomer of a diltiazem(1+).
2-[(2R,3R)-3-acetyloxy-2-(4-methoxyphenyl)-4-oxo-2,3-dihydro-1,5-benzothiazepin-5-yl]ethyl-dimethylazanium