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