114472-81-0 L-Alanine, N-(N-(N-(N-(N-(N-(N-(N-L-seryl-L-seryl)-L-tryptophyl)-L-alanyl)-L-valyl)-L-leucyl)-L-alpha-glutamyl)-L-valyl)- Peptide pva Pva peptide Ser-ser-trp-ala-val-leu-glu-val-ala Vasopressin antisense peptide