Protective Groups

4-[(3-ethylphenyl)amino]-4-oxobutanoic acid

4-(cycloheptylamino)-4-oxobutanoic acid

4-(cyclooctylamino)-4-oxobutanoic acid

4-(cyclopentylamino)-4-oxobutanoic acid

2-(3-methyl-1H-pyrazol-1-yl)succinic acid

methyl [(5-amino-1,3,4-thiadiazol-2-yl)thio]acetate

(4,6,7-trimethyl-1-benzofuran-3-yl)acetic acid

3-amino-3-(4-ethoxy-1-naphthyl)propanoic acid

[(3,4,7-trimethyl-2-oxo-2H-chromen-5-yl)oxy]acetic acid

(2-methoxy-4-propionylphenoxy)acetic acid

[(4,6-dihydroxypyrimidin-2-yl)thio]acetic acid

[(3-formyl-6-methoxyquinolin-2-yl)thio]acetic acid

[2-(cyclohexylthio)-1H-benzimidazol-1-yl]acetic acid

ethyl (3-formyl-2-methyl-1H-indol-1-yl)acetate

(2,3,6-trimethylphenoxy)acetic acid

3-[(4-amino-6-oxo-1,6-dihydropyrimidin-2-yl)thio]propanoic acid