The chemical H-Pro-Thr-Glu-Phe-p-nitro-Phe-Arg-Leu-OH has a known molecular formula of C44-H63-N11-O13. Synonyms may include: Prolyl-threonyl-glutamyl-phenylalanyl-4-nitrophenylalanyl-arginyl-leucine, Pro-thr-glu-phe-4-nitro-phe-arg-leu, Ptgp-NP-AL (ChemID).