●　D-Leucine
●　DL-Leucine
●　N-Acetyl-DL-Leucine
●　N-Acetyl-L-Leucine
●　N-Acetyl-D-Leucine
●　DL-Isoleucine
●　D-Isoleucine
●　D-Alloisoleucine
●　L-Norleucine