1 192 1-aminocyclobutanecarboxlic acid 1.000 2 ZPM Cyclobutanecarboxylic acid 0.875 3 II7 Cis-3-aminocyclobutane carboxylic acid 0.778 4 JEG Trans-1-aminocyclobutane-1,3-dicarboxylic acid 0.727 5 AC5 1-aminocyclopentanecarboxylic acid 0.700