InChI=1/C16H17N2O4S/c1-11-7-8-13(9-14(11)18-23(3,20)21)17-10-12-5-4-6-15(22-2)16(12)19/h4-10H,1-3H3,(H,17,19)/q-1/f/h19H 55B1120D22472236