5-Dimethylaminonaphthalene-1-sulfonyl-phe-leu-arg 82543-28-0 Dansyl-phenylalanyl-leucyl-arginine Dns-phe-leu-arg L-Arginine, N2-(N-(N-((5-(dimethylamino)-1-naphthalenyl)sulfonyl)-L-phenylalanyl)-L-leucyl)-