InChI=1S/C19H16O8S/c20-14-5-13(6-15(21)8-14)18-7-12-2-4-17-16(19(12)27-18)3-1-11(9-25-17)10-26-28(22,23)24/h1-2,4-8,20-21H,3,9-10H2,(H,22,23,24)