InChI=1/C16H16N2O4/c1-16(2)9-7-21-10-6-4-3-5-8(10)11(9)12-13(19)17-15(20)18-14(12)22-16/h3-6,9,11H,7H2,1-2H3,(H2,17,18,19,20)/t9-,11+/m0/s1/f/h17-18H 65A1E48BA6D72D68