InChI=1S/C21H32O7/c1-11(2)21(9-8-20(4)7-5-6-12(3)13(20)10-21)28-19-16(24)14(22)15(23)17(27-19)18(25)26/h13-17,19,22-24H,1,3,5-10H2,2,4H3,(H,25,26)