1,2,5,6-Tetrahydro-3-pyridinecarboxylic acid methyl ester hydrochloride 3-Pyridinecarboxylic acid, 1,2,5,6-tetrahydro-, methyl ester, hydrochloride 6197-39-3 Guvacine methyl ester hydrochloride Guvacoline hydrochloride Nicotinic acid, 1,2,5,6-tetrahydro-, methyl ester, hydrochloride (7CI) Norarecoline hydrochloride