InChI=1S/C19H18O8S/c1-23-18-8-12(3-2-6-26-28(20,21)22)7-14-10-16(27-19(14)18)13-4-5-15-17(9-13)25-11-24-15/h4-5,7-10H,2-3,6,11H2,1H3,(H,20,21,22)