4-(2,4-二甲氧基亚苄基)-5-氧代-2-苯噁唑烷

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

4-(benzylsulfanylmethylidene)-2-phenyl-1,3-oxazol-5-one

尿素

2-[(5-oxo-2-phenyl-1,3-oxazol-4-ylidene)methylamino]acetic acid