6-methyl-2-[(3-methyl-6-oxo-1-cyclohexa-2,4-dienylidene)methylamino]-5,7-dihydro-4H-thieno[2,3-c]pyridine-3-carboxylic acid ethyl ester
6-methyl-2-[(3-methyl-6-oxo-1-cyclohexa-2,4-dienylidene)methylamino]-5,7-dihydro-4h-thieno[2,3-c]pyridine-3-carboxylic acid ethyl ester