H-a-Cyclopentenyl-DL-Ala-OH

H-BETA-CYCLOPENTENYL-DL-ALA-OH

H-b-(1-Cyclopentenyl)-DL-Ala-OH

BETA-(1-CYCLOPENTENYL)-DL-ALANINE

H-BETA-(1-CYCLOPENTENYL)-DL-ALA-OH

2-AMINO-3-CYCLOPENT-1-ENYL-PROPIONIC ACID