InChI=1/C20H17NO7/c1-3-26-20(23)12(2)27-15-7-8-16-17(11-15)28-18(19(16)22)10-13-5-4-6-14(9-13)21(24)25/h4-12H,3H2,1-2H3/b18-10+/t12-/m0/s1 0A819094F148A3D5