InChI=1S/C22H28O7/c1-14(21(24)16-8-9-17(25-2)18(13-16)26-3)29-22-19(27-4)11-15(7-6-10-23)12-20(22)28-5/h6-9,11-14,21,23-24H,10H2,1-5H3/b7-6-