88793-96-8 H-Hexahydrotyrosyl-norleucyl-arginine-4-nitroanilide H-Nle-hht-lys-pna H-Norleucyl-hexahydrotyrosyl-lysine-4-nitroanilide L-Argininamide, D-norleucyl-3-(4-hydroxycyclohexyl)-L-alanyl-L-lysyl-N-(4-nitrophenyl)- Spectrozyme PL Spectrozyme-PL