InChI=1S/C12H14O8/c13-5-1-3-6(4-2-5)19-12-9(16)7(14)8(15)10(20-12)11(17)18/h1-4,7-10,12-16H,(H,17,18)/t7-,8-,9+,10-,12+/m0/s1