InChI=1S/C18H16O7S/c19-26(20,21)24-7-1-2-12-3-5-15-14(8-12)10-17(25-15)13-4-6-16-18(9-13)23-11-22-16/h3-6,8-10H,1-2,7,11H2,(H,19,20,21)