InChI=1S/C21H32O7/c1-9(2)6-5-7-20(3)11-8-10-12(21(10,20)4)16(11)27-19-15(24)13(22)14(23)17(28-19)18(25)26/h6,10-17,19,22-24H,5,7-8H2,1-4H3,(H,25,26)