amezinium [ 4-amino-6-methoxy-1-phenylpyridazinium methylsulfate,Gr++nenthal brand of amezinium methyl sulfate,LU 1631,Regulton,Supratonin,Teofarma brand of amezinium methyl sulfate,amezinium chloride,amezinium methyl sulfate,amezinium metisulfate,amezinium triflouoacetate salt (1:1) ] RN &N1 for parent cpd from 9th CI Form Index; structure in Negwer, 5th ed, #6252