InChI=1/C19H20N2O4S/c1-11-5-6-12(2)16(9-11)13(3)20-18(22)14-7-8-15-17(10-14)26(24,25)21(4)19(15)23/h5-10,13H,1-4H3,(H,20,22)/t13-/m1/s1/f/h20H 0C7E70EE1258F84D