InChI=1S/C19H26O7/c1-8-5-12-14(10(3)18(24)25-12)16(26-17(23)9(2)7-20)19(4)13(22)6-11(21)15(8)19/h8,10-12,14-16,20-21H,2,5-7H2,1,3-4H3