InChI=1S/C12H14O9/c13-4-2-1-3-5(14)9(4)20-12-8(17)6(15)7(16)10(21-12)11(18)19/h1-3,6-8,10,12-17H,(H,18,19)/t6-,7-,8+,10-,12+/m0/s1