InChI=1S/C21H26O8/c1-11(28-21-18(24)16(22)17(23)19(29-21)20(25)26)3-4-12-5-6-14-10-15(27-2)8-7-13(14)9-12/h5-11,16-19,21-24H,3-4H2,1-2H3,(H,25,26)/t11?,16-,17-,18+,19-,21?/m0/s1