InChI=1S/C23H18N2O5S/c1-2-24-23(31)25-12-3-6-15(18(9-12)22(28)29)21-16-7-4-13(26)10-19(16)30-20-11-14(27)5-8-17(20)21/h3-11,26H,2H2,1H3,(H,28,29)(H2,24,25,31)