4-(2-N-boc-吡咯)苯乙酸

2-[4-(carbamoylamino)phenyl]acetic acid

8-[(4-aminophenyl)methyl]-1,3-dimethyl-7H-purine-2,6-dione

2-[4-(ethoxycarbonylamino)phenyl]acetic acid

2-(4-benzamidophenyl)acetic acid