dipropyl pyridine-2,6-dicarboxylate

3,6,9,12,15-pentaoxa-21-azabicyclo[15.3.1]henicosa-1(21),17,19-triene-2,16-dione

4,7,13,16-四氧杂-1,10,26-三氮杂三环[8.8.7.120,24]二十六碳-20,22,24(26)-三烯-19,25-二酮