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

N,N'-bis-methylisophthaldiamide

1-S,3-S-bis(1,3-benzoxazol-2-yl) benzene-1,3-dicarbothioate

2-[3-(4-oxo-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d][1,3]oxazin-2-yl)phenyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d][1,3]oxazin-4-one

2-[3-(4-oxo-5,6-dihydrothieno[2,3-d][1,3]oxazin-2-yl)phenyl]-5,6-dihydrothieno[2,3-d][1,3]oxazin-4-one