| 摘要 |
This invention relates to peptide derivatives of the formula <CHEM> or salts thereof, wherein: (a) Q1 represents a 1-dimethylamino-2-methylpropyl group and Q2 represents an (R)- or (S)-2-hydroxy-2-phenylethylamino group, a 2-phenylcyclopropylamino group or a 1,2,3,4-tetrahydroisoquinolin-2-yl group, or (b) Q1 represents a 1-methyl-2-pyrrolidinyl group and Q2 represents <CHEM> These peptide derivatives or salts thereof have a more powerful antitumor activity than dolastatin 10 and are hence useful as anticancer or antitumor agents. |
