This invention is directed to didemnin derivatives, including N-acyl congeners of didemnin A (DA); several DDB-type analogues of DA in which either pyruvic acid has been replaced (with phenylpyruvic acid or alphaketobutyric acid) or proline at position 8 has been replaced [with L-azetidine-2-carboxylic acid (AZT), L-pipecolic acid (Pip), 1-amino-1-carboxylic cyclopentane (acc.sup.5), D-Pro or sarcosine (sar); and other cyclic depsipeptides related to the didemnins, which were isolated from a relatively polar extract of the tunicate T. solidum; namely the didemnins--X [(R)-3-hydroxy-decanoyl-(Gln).sub.3 -Lac-Pro didemnin A]; Y [(R)-3-hydroxy-decanoyl-(Gln).sub.4 -Lac-Pro didemnin A]; M (pGlu-Gln-Lac-Pro-didemnin A); N ([Tyr.sup.5 ] didemnin B); nordidemnin N ([Tyr.sup.5 ] nordidemnin B); and epididemnin A ([2S,4R-Hip.sup.2 ] didemnin A).
本发明涉及地德明衍
生物,包括地德明A(
DA)的N-酰基同分异构体; 几种DDB型地德明A类似物,其中
丙酮酸被取代(用
苯丙酮酸或α-酮基
丁酸)或第8位的脯
氨酸被取代[用L-氮杂二
环戊酸(AZT),L-
吡咯烷酸(Pip),1-
氨基-1-羧基
环戊烷(acc.sup.5),D-Pro或
肌氨酸(sar); 以及与地德明相关的其他环状脱酸肽,这些脱酸肽从相对极性提取的海鞘T. solidum中分离出来; 即地德明-X [(R)-
3-羟基癸酸酰-(Gln).sub.3-Lac-Pro地德明A]; Y [(R)-
3-羟基癸酸酰-(Gln).sub.4-Lac-Pro地德明A]; M(pGlu-Gln-Lac-Pro-didemnin A); N([Tyr.sup.5]地德明B); nordidemnin N([Tyr.sup.5] nordidemnin B); 和epididemnin A([2S,4R-Hip.sup.2]地德明A)。