"3-Oxo-3,5,7,8-tetrahydro-2H-pyrido[4,3-c]pyridazine-6-carboxylic acid benzyl ester"
"3-Oxo-3,5,7,8-tetrahydro-2H-pyrido[4,3-c]pyridazine-6-carboxylic acid benzyl ester"
"3-Oxo-3,5,7,8-tetrahydro-2H-pyrido[4,3-c]pyridazine-6-carboxylic acid benzyl ester"