InChI=1S/C18H18ClNO8/c1-27-14-7-10(21)9(5-11(14)22)20-15(25)4-3-8-16(18(26)28-2)12(23)6-13(24)17(8)19/h5-7,21-24H,3-4H2,1-2H3,(H,20,25)