InChI=1/C20H18N2O6S/c1-25-14-8-5-9-16-18(14)22(10-17(23)26-2)20(29-16)21-19(24)15-11-27-12-6-3-4-7-13(12)28-15/h3-9,15H,10-11H2,1-2H3/t15-/m0/s1 2025C109BD657DD4