Synonyms: 1,2,4-Triazolo[4,3-a]pyrazine-3-carboxylic acid, 5,6,7,8-tetrahydro-, ethyl ester;5,6,7,8-Tetrahydro-1,2,4-triazolo[4,3-a]pyrazine-3-carboxylic acid ethyl ester;Ethyl 5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine-3-carboxylate hydrochloride;