The chemical Nociceptin has a designated molecular formula of C79H129N27O22 and a molecular weight of 1809.068 g/mol. Synonyms may include: Nociceptin (1-17), Orphanin FQ, Orphanin FQ (human), Orphanin FQ (rat), Human nociceptin, Nociceptin (human), UNII-7AYI9N34FF (ChemID).