InChI=1/C15H14N2O3S/c1-9(18)10-2-4-11(5-3-10)20-8-13-16-12-6-7-21-14(12)15(19)17-13/h2-7,9,18H,8H2,1H3,(H,16,17,19)/t9-/m1/s1/f/h17H 6AF78C6E4D2C35C7