InChI=1S/C20H22O6/c1-20(2,25)8-7-13-16(22)6-5-14-18(24)15(10-26-19(13)14)12-4-3-11(21)9-17(12)23/h3-6,9,15,21-23,25H,7-8,10H2,1-2H3