29650-17-7 4,5,6,7-Tetrahydro-2-amino-6-butylthieno(2,3-c)pyridine-3-carboxylic acid ethyl ester HCl Thieno(2,3-c)pyridine-3-carboxylic acid, 4,5,6,7-tetrahydro-2-amino-6-butyl-, ethyl ester, monohydrochloride