98640-66-5 Boc-28,31-nle-cck-7 Boc-tyr(SO3H)nle-gly-trp-nle-asp-phenh2 Cholecystokinin (27-33), tert-butyloxycarbonyl-nle(28,31)- Cholecystokinin (27-33), tert-butyloxycarbonylnorleucyl(28,31)- L-Phenylalaninamide, N-((1,1-dimethylethoxy)carbonyl)-O-sulfo-L-tyrosyl-L-norleucylglycyl-L-tryptophyl-L-norleucyl-L-alpha-aspartyl- t-Boc(nle(28,31))-cck (27-33) tert-Butoxycarbonyltyrosyl(sulfo)-norleucyl-glycyl-tryptophyl-norleucyl-aspartyl-phenylalaninamide tert-Butyloxycarbonyl-28,31-nle-cholecystokinin (27-33)