6-(benzylcarbamoyl)pyridine-2-carboxylic acid

3,6,9,12-tetraoxa-18-azabicyclo[12.3.1]octadeca-1(18),14,16-triene-2,13-dione

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

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

3,6,9,12,15,18-hexaoxa-24-azabicyclo[18.3.1]tetracosa-1(24),20,22-triene-2,19-dione