2-Butyn-1-ol, 4-(dimethylamino)-, dimethylcarbamate, hydrochloride 3854-11-3 4-Dimethylaminobut-2-ynyl dimethylcarbamate hydrochloride CARBAMIC ACID, DIMETHYL-, 4-(DIMETHYLAMINO)-2-BUTYNYL ESTER, HYDROCHLORIDE