英文名称 英文名称 英文名称 英文名称 D-Alanine L-Alanine DL-Alanine β-Alanine D(-)-Arginine L-Arginine DL-Arginine γ-aminobutyric acid D-Asparagine L-Asparagine DL-Asparagine D-Pyroglutamic acid D-Aspartic acid L-Aspartic acid DL-Aspartic acid D-proline D-Cysteine L-Cysteine DL-Cysteine D-Cystine D-glutamine L-Glutamine DL-Glutamine L-Citrulline D(-)-Glutamic acid L-Glutamic acid DL-Glutamic acid L-Theanine D-Histidine …