181274-15-7 239090-29-0 BAY-MKH 6561 Benzoic acid, 2-((((4,5-dihydro-4-methyl-5-oxo-3-propoxy-1H-1,2,4-triazol-1-yl)carbonyl)amino)sulfonyl)-, methyl ester, sodium salt MKH 6561 Methyl 2-((((4,5-dihydro-4-methyl-5-oxo-3-propoxy-1H-1,2,4-triazol-1-yl)carbonyl)amino)sulfonyl)benzoate sodium salt Olympus Procarbazone sodium Propoxycarbazone sodium