12H,15H-<1,3,4>thiadiazolo<2,3-b:5,4-b'>diquinazoline-12,15-dione

methyl 2-[(2-aminobenzoyl)amino]acetate

[2-oxo-2-[2-(prop-2-ynylcarbamoyl)anilino]ethyl] acetate

(4-oxo-3-prop-2-ynylquinazolin-2-yl)methyl acetate

4-oxo-3-prop-2-ynylquinazoline-2-carbaldehyde