Novel derivatives of 2,3-dihydro-5H-thiazolo[2,3-b]quinazoline, such as (3-oxo-5H-thiazolo[2,3-b]quinazolin-2(3H)-ylidene)acetic acid ethyl ester, N-Benzyl-[3-oxo-5H-thiazolo[2,3-b]quinazolin-2(3H)-ylidene]acetamide, N-tertbutyl-N-benzyl-(3-oxo-5H-thiazolo[2,3-b]quinazolin-2(3H)-ylidene)ace tamide, and 2,3-dihydro-3-oxo-5H-thiazolo[2,3-b]quinazoline-2-acetic acid methyl ester; useful as immunomodulators.
                            2,3-二氢-5H-
噻唑并[2,3-b]
喹唑啉的新型衍
生物,例如(3-氧代-5H-
噻唑并[2,3-b]
喹唑啉-2(3H)-基)
乙酸乙酯,N-苄基-[3-氧代-5H-
噻唑并[2,3-b]
喹唑啉-2(3H)-基]乙酰胺,N-叔丁基-N-苄基-(3-氧代-5H-
噻唑并[2,3-b]
喹唑啉-2(3H)-基)乙酰胺,以及2,3-二氢-3-氧代-5H-
噻唑并[2,3-b]
喹唑啉-2-
乙酸甲酯;可用作免疫调节剂。