InChI=1S/C18H22Cl2O11/c1-29-9-3-6(2-7(21)5-8(22)16(19)20)4-10(11(9)23)30-18-14(26)12(24)13(25)15(31-18)17(27)28/h3-4,8,12-16,18,22-26H,2,5H2,1H3,(H,27,28)