4,4-联苯丙氨酸-1,1-二甲基乙酯

tert-butyl 2-(4-nitrophenyl)acetate

tert-butyl 3-hydroxy-3-(4-nitrophenyl)propanoate

tert-butyl 4-oxopentanoate

tert-butyl 2-(2-hydroxyoxolan-2-yl)acetate