B 8614 (OTTO) Nα-Benzoyl-L-arginine 4-nitroanilide hydrochloride ≥99% (TLC), suitable for substrate for trypsin Cas 21653-40-7 - used as a substrate for chymotrypsin and trypsin activity assay in enzymatic extract (EE) of M. tenellum and pancreatic tissue homogenates