●　D-Proline
●　D-Aspartic Acid
●　D-Asparagine Monohydrate
●　D-Glutamic Acid
●　D-Tyrosine
●　D-Histidine
●　D-Methionine
●　D-α-Aminohexanoic Diacid
●　L-α-Aminohexanoic Diacid
●　L-2,3-Diaminopropionic Acid