InChI=1/C17H20N2O4/c1-19-12-5-4-6-13(20)15(12)16(18-17(19)21)11-9-10(22-2)7-8-14(11)23-3/h7-9,16H,4-6H2,1-3H3,(H,18,21)/t16-/m0/s1/f/h18H C319A165D54C326F