InChI=1S/C23H24O7/c1-22(2)8-7-11-16(30-22)10-14(25)19-20(27)18-12(9-17(26)23(3,4)28)13(24)5-6-15(18)29-21(11)19/h5-8,10,17,24-26,28H,9H2,1-4H3