| 摘要 |
The novel polypeptide of the formula <IMAGE> and the pharmaceutically acceptable acid-addition salts thereof reduce the levels of serum calcium. The compound is built up from the amino acids and/or peptides shown in the formula in the amino acid sequence shown in the formula, and the peptide unit, which contains the <IMAGE> group, in which R is a reactive ester, is subjected to a ring-closure reaction at any desired step of the reaction. |
