InChI=1S/C22H24O6/c1-10-5-6-12-14(20(10)27-3)19(25)15-16(21(12)28-4)18(24)13-9-22(2,26)8-7-11(13)17(15)23/h5-7,13,18,24-26H,8-9H2,1-4H3