InChI=1/C22H22N2O7/c25-20(14-3-4-15-17(12-14)31-13-30-15)18-19(16-2-1-9-29-16)24(22(27)21(18)26)6-5-23-7-10-28-11-8-23/h1-4,9,12,19,26H,5-8,10-11,13H2/p-1/t19-/m0/s1/fC22H21N2O7/h26h/q-1 BC4D1B4F734D8EC1