InChI=1/C19H20N2O7S/c1-10(2)17(18(22)23)21-29(25,26)12-5-7-14-13-6-4-11(20-19(24)27-3)8-15(13)28-16(14)9-12/h4-10,17,21H,1-3H3,(H,20,24)(H,22,23)/p-1/t17-/m0/s1/fC19H19N2O7S/h20H/q-1 57F2D4515B669B55