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(S)-2-methyl-2-pyrrolidinecarboxylic acid

D-5-methylproline

(Diphenylmethyl)thio acetic acid ethyl ester

Sodium 2,8-dihydroxynaphthalene-6-sulfonate

Diethyl trans-4-methylene-1,2-cyclopentane dicarboxylate

3,4-Dihydroxyphenylalanine

7-Methoxyl-1-tetralone

4-Bromo-3-methylaniline

3,4,5-Trifluoro-l-phenylalanine