InChI=1S/C19H19ClO7/c1-2-3-4-5-6-7-8-9-10-11-13(12-20)26-19-16(23)14(21)15(22)17(27-19)18(24)25/h2-3,10-11,13-17,19,21-23H,12H2,1H3,(H,24,25)/b3-2-,11-10+