20283-89-0 L-Arginine, N2-(1-(N-(N-(1-(((4-(phenylazo)phenyl)methoxy)carbonyl)-L-prolyl)-L-leucyl)glycyl)-L-prolyl)- PZ-Plgpa PZ-Pro-leu-gly-prop-arg Phenylazobenzyloxycarbonyl-prolyl-leucyl-glycyl-prolyl-arginine