InChI=1/C16H18N2O3S/c1-10-14(15(19)21-3)12(18-16(22)17-10)9-8-11-6-4-5-7-13(11)20-2/h4-9,12H,1-3H3,(H2,17,18,22)/b9-8+/t12-/m1/s1/f/h17-18H 0CA4EE92E438E092