InChI=1S/C14H18O8S/c1-14(2)7-12(22-23(18,19)20)9-5-8(3-4-13(16)17)10(15)6-11(9)21-14/h5-6,12,15H,3-4,7H2,1-2H3,(H,16,17)(H,18,19,20)