InChI=1S/C21H30O9/c1-10(9-29-20-17(26)15(24)16(25)18(30-20)19(27)28)12-3-4-21(7-12)11(2)5-14(23)6-13(21)8-22/h6,11-12,15-18,20,22,24-26H,1,3-5,7-9H2,2H3,(H,27,28)