143323-55-1 8-Amino-5-chloro-2,3-dihydro-7-phenylpyrido(3,4-d)pyridazine-1,4-dione 8-Amino-5-chloro-7-phenylpyrido(3,4-d)pyridazine-1,4(2H,3H)dione L 012 L-012 Pyrido(3,4-d)pyridazine-1,4-dione, 8-amino-5-chloro-2,3-dihydro-7-phenyl-