a series of 1-acylamino boronic acids ( ia-va ) , analogues of the amino acids phenylalanine , phenylglycine , alanine , valine , and isoleucine , were prepared as potential transition-state inhibitors of the serine proteases alpha-chymotrypsin and elastase , by a boronate homologation reaction .
C0002520
amino acids
C0001898
alanine