InChI=1S/C21H24O7/c1-10(2)12-5-4-11(3)14-7-6-13(15(14)8-12)9-27-21-18(24)16(22)17(23)19(28-21)20(25)26/h4-8,16-19,21-24H,1,9H2,2-3H3,(H,25,26)