螺[异苯并呋喃-1(3H),4’-哌啶]-3-酮

4,4-二甲基-2-苯基-2-噁唑啉

2-(2-benzylphenyl)-4,4-dimethyl-5H-1,3-oxazole

2,3-二甲氧基-9H-芴-9-酮

4,4-二甲基-2-(4'-甲基-2-联苯基)-2-噁吖啉