InChI=1S/C21H32O7/c1-10(2)12-5-7-21(4)8-6-14(11(3)13(21)9-12)27-20-17(24)15(22)16(23)18(28-20)19(25)26/h12-18,20,22-24H,1,3,5-9H2,2,4H3,(H,25,26)