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