Synonyms : Delta Sleep Inducing Peptide, Delta-Sleep Peptide, Delta-Sleep-Inducing Peptide, Delta-Sleep-Inducing-Peptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, Delta Sleep Peptide, Peptide, Delta Sleep-Inducing, Peptide, Delta-Sleep, Peptide, Delta-Sleep-Inducing