InChI=1S/C22H22O5/c1-27-22-14-17(10-13-21(22)26)5-3-7-20(25)15-19(24)6-2-4-16-8-11-18(23)12-9-16/h2-3,6-14,23,26H,4-5,15H2,1H3/b6-2-,7-3+