氢碘酸

N,O-diacetyl-tyrosine ethyl ester

5-[(4-羟基苯基)甲基]咪唑烷-2,4-二酮

3,6-bis-(4-methoxy-benzylidene)-piperazine-2,5-dione

5-(4-methoxybenzylidene)imidazolidine-2,4-dione