InChI=1S/C21H21ClO6/c1-9(2)5-6-12-10(3)19-15(7-14(12)24)27-20-13(8-23)18(25)17(22)11(4)16(20)21(26)28-19/h5,7,23-25H,6,8H2,1-4H3