InChI=1/C16H16N2O4S/c17-23(21,22)15-6-4-12(5-7-15)8-9-18-11-13-2-1-3-14(10-13)16(19)20/h1-7,10-11H,8-9H2,(H,19,20)(H2,17,21,22)/b18-11+/f/h18H,17H2 EF07E3B11ACAD1B2