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