InChI=1S/C19H19ClO8/c20-12-13(21)10-8-6-4-2-1-3-5-7-9-11-27-19-16(24)14(22)15(23)17(28-19)18(25)26/h7-10,13-17,19,21-24H,11-12H2,(H,25,26)/b9-7-,10-8+