| 摘要 |
<p>One equiv. of an N-protected peptide having a free carboxyl group is reacted with one equiv. of a carbondimide, two equivs. of N-hydroxysuccinmide or N-hydroxyphthalimide and 1 equiv. of N-ethyl-morphine of di-isopropyl-ethyl-amine and the ester formed is reacted with the free amino groups of a peptide opt. contg. free OH and COOH groups.</p> |
