(4Z)-4-[(2-hydroxyphenyl)methylidene]-2-phenyl-1,3-oxazol-5-one

4-cyclohexylidene-2-phenyl-1,3-oxazol-5-one

2-phenyl-4-trityl-4H-1,3-oxazol-5-one

4-[1-(4-nitrophenyl)ethylidene]-2-phenyl-1,3-oxazol-5-one

ethyl (S,E)-4,5-dihydroxypent-2-enoate