InChI=1S/C19H20O7/c1-21-13-6-5-9-14-11(8-25-15(9)18(13)23-3)10-7-12(20)17(22-2)19(24-4)16(10)26-14/h5-7,11,14,20H,8H2,1-4H3/t11-,14-/m0/s1