6VIM:
reference: Potent Inhibition of Mandelate Racemase by Boronic Acids: Boron as a Mimic of a Carbon Acid Center., Sharma AN, Grandinetti L, Johnson ER, St Maurice M, Bearne SL, Biochemistry. 2020 Aug 25;59(33):3026-3037. doi: 10.1021/acs.biochem.0c00478., Epub 2020 Aug 10. PMID: 32786399

This OCA Structure page
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