1.13.11.23	2,3-Dimercaptopropanol	47% inhibition at 1 mM, 59% inhibition at 5 mM	
1.13.11.23	ascorbic acid	30% inhibition at 1 mM	
1.13.11.23	catechol	45% inhibition at 1 mM	
1.13.11.23	o-phenanthroline	46% inhibition at 1 mM