117811-28-6 12,14-Lys-17-nle-26-val-28-thr-vasoactive intestinal peptide Llnvt-vip Vasoactive intestinal peptide, Ac-(lys(12,14)-nle(17)-val(26)-thr(28))- Vasoactive intestinal peptide, acetyl-(lysyl(12,14)-norleucyl(17)-valyl(26)-threonine(28))-