InChI=1S/C22H24O7/c1-13(15-10-6-3-7-11-15)16(12-14-8-4-2-5-9-14)28-22-19(25)17(23)18(24)20(29-22)21(26)27/h2-11,16-20,22-25H,1,12H2,(H,26,27)