InChI=1S/C21H32O7/c1-10(2)5-4-6-21(11-7-12-13(8-11)20(12,21)3)9-27-19-16(24)14(22)15(23)17(28-19)18(25)26/h5,11-17,19,22-24H,4,6-9H2,1-3H3,(H,25,26)