| 摘要 |
New pentapeptide of formula (I), in which X<1> and X<2> are the same or different and are OH or NH2, Y is H or OH, X<3> is CO or CH2, one of the groups Z<1> and Z<2> is H and the other is H or CH3, all the amino acid units being in L-configuration, with the exception that the C-terminal amino acid unit is in D-configuration when Z<2> is methyl, and the C-terminal carboxyl group may be reduced to -CH2-OH or be in amide form, and cation complexes and salts thereof. The pentapeptide may be prepared by subjecting a protected derivative thereof to deprotection. The pentapeptide has cell growth regulatory activity. |
