InChI=1S/C19H18N2O6S/c1-27-18(23)16-15(11-28(25,26)14-5-3-2-4-6-14)20-19(24)21-17(16)12-7-9-13(22)10-8-12/h2-10,17,22H,11H2,1H3,(H2,20,21,24)