(R,S)-N-(2-cyanoethyl)-N-methyl-β-phenyl-β-alanine

3-甲基氨基-3-苯丙酸

1-溴-4-氯丁烷

5-methyl-4-phenyl-1,5-diazocan-2-one

(R,S)-N-(2-aminopropyl)-N-methyl-β-phenyl-β-alanine