the serine proteases human leukocyte ( hl ) elastase , porcine pancreatic elastase , cathepsin g , and bovine chymotrypsin a alpha are inhibited competitively at ph 7.5 by heterocyclic compounds such as 2-substituted 4h-3,1-benzoxazin-4-ones , 4-quinazolines , and 4-chloroquinazolines , n-substituted phthalimides , and by thioesters of n-acylanthranilic acids .
C0064833
human leukocyte
C0030306
pancreatic elastase