InChI=1S/C21H22ClNO8/c1-20(30)7-4-8-17(23(2)3)11(26)6-12(27)21(8,31)19(29)13(7)18(28)14-9(24)5-10(25)16(22)15(14)20/h5,7-8,13,17,24-25,30-31H,4,6H2,1-3H3/t7?,8?,13?,17?,20-,21+/m0/s1