4-(dimethylamino)-but-2-enoic acid hydrochloride, (E)-4-(Dimethylamino)But-2-Enoic Acid Hydrochloride, 4-(Dimethylamino)-2-butenoic acid hydrochloride, 4-N,N-dimethyl-aminocrotonic acid hydrochloride, 4-Dimethylamino-but-2-enoic acid hydrochloride salt, trans-4-dimethylaminocrotonicacid hydrochloride