80733-88-6 DGPNP Dansyl-gly-nitro-phe-pro Dansyl-glycyl-nitrophenylalanyl-proline Dansylglycyl-nitrophenylalanyl-proline Dns-gly-phe(No2)-pro L-Proline, 1-(N-(N-((5-(dimethylamino)-1-naphthalenyl)sulfonyl)glycyl)-4-nitro-L-phenylalanyl)-