Amino acid derivatives having anti-tumor activity and compositions containing them

摘要

Amino acid amides of formula (I): <IMAGE> (I) wherein R1-R5 and Y represent a variety of organic groups and atoms (including where R2, Y and the adjacent nitrogen atom together represent a thiazolidine or pyrrolidine group) and X represents carbonyl or sulfonyl are mostly new compounds and have valuable anti-tumor and immuno-regulatory activities. They may be formulated in compositions for pharmaceutical use.