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