Protective Groups

isopropyl (3-formyl-1H-indol-1-yl)acetate

[3-(cyclopropylcarbonyl)-1H-indol-1-yl]acetic acid

(2-methyl-3,5-dioxo-4-azatricyclo[5.2.1.0~2,6~]dec-8-en-4-yl)acetic acid

(7-methoxy-4-methyl-2-oxo-2H-chromen-3-yl)acetic acid

N-[(4-ethylcyclohexyl)carbonyl]glycine

ethyl (5-formyl-2-methoxyphenoxy)acetate

isopropyl (4-formylphenoxy)acetate

[(4,8-dimethyl-2-oxo-2H-chromen-7-yl)oxy]acetic acid

N-[(4-ethylphenyl)sulfonyl]glycine

N-[(2,4-dimethylphenyl)sulfonyl]glycine

[2-(ethylthio)-1,3-thiazol-4-yl]acetic acid

[(3-ethyl-1H-1,2,4-triazol-5-yl)thio]acetic acid

methyl 3-(2-amino-4-hydroxy-6-methyl-5-pyrimidinyl)propanoate

isopropyl 3-(2-amino-4-hydroxy-6-methyl-5-pyrimidinyl)propanoate

{2-[(4-methylphenyl)amino]-4-oxo-4,5-dihydro-1,3-thiazol-5-yl}acetic acid

(9-oxo-4,5,6,7,8,9-hexahydro[1,2,4]triazolo[5,1-b]quinazolin-2-yl)acetic acid