InChI=1/C15H18N2O4S/c1-9-4-2-3-5-13(9)17-22(20,21)10-6-7-11-12(8-10)15(19)16-14(11)18/h6-9,13,17H,2-5H2,1H3,(H,16,18,19)/t9-,13-/m1/s1/f/h16H 286550A0CC28FEE4