InChI=1S/C17H16O7S/c18-14-5-4-12(9-15(14)19)17-10-13-8-11(3-6-16(13)24-17)2-1-7-23-25(20,21)22/h3-6,8-10,18-19H,1-2,7H2,(H,20,21,22)