InChI=1S/C21H25ClO6/c1-6-12(2)9-13(3)7-8-15-10-16-17(22)18(24)20(5,28-14(4)23)19(25)21(16,26)11-27-15/h7-10,12,26H,6,11H2,1-5H3/b8-7+,13-9+