InChI=1S/C23H22O5/c1-12(2)5-6-13-15(24)7-8-16-19(13)22(26)20-18(27-16)11-17-14(21(20)25)9-10-23(3,4)28-17/h5,7-11,24-25H,6H2,1-4H3