2-(5-Dimethylamino-naphthalene-1-sulfonylamino)-4-methyl-pentanoic acid InChI=1/C18H24N2O4S/c1-12(2)11-15(18(21)22)19-25(23,24)17-10-6-7-13-14(17)8-5-9-16(13)20(3)4/h5-10,12,15,19H,11H2,1-4H3,(H,21,22 N-{[5-(dimethylamino)-1-naphthyl]sulfonyl}leucine leucine, N-[[5-(dimethylamino)-1-naphthalenyl]sulfonyl]-