InChI=1S/C22H24O5/c1-14(2)5-11-17-19(26-3)13-20(27-4)21(22(17)25)18(24)12-8-15-6-9-16(23)10-7-15/h5-10,12-13,23,25H,11H2,1-4H3/b12-8+