| pubmed-article:1992147 | pubmed:articleTitle | trans-3-n-propyl-L-proline is a highly favorable, conformationally restricted replacement for methionine in the C-terminal tetrapeptide of cholecystokinin. Stereoselective synthesis of 3-allyl- and 3-n-propyl-L-proline derivatives from 4-hydroxy-L-proline. | lld:pubmed |
