1 HNR N-(6-amino-1-butyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-N-methyl-benzenesulfonamide 1.000 2 N6A N-(6-amino-1-benzyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-N-methylbenzenesulfonamide 0.700