InChI=1S/C20H19ClO6/c1-9(2)4-5-11-10(3)19-16(6-13(11)23)26-15-7-14(24)18(21)12(8-22)17(15)20(25)27-19/h4,6-7,22-24H,5,8H2,1-3H3