108428-42-8 2-Amino-1-hydroxycyclobutane-1-acetic acid 2-Amino-1-hydroxycyclobutaneacetic acid (1S-cis)- CBAA Cyclobutaneacetic acid, 2-amino-1-hydroxy-, (1S-cis)- cis-2-Amino-1-hydroxycyclobutane-1-acetic acid