A condensed pyrimidine derivative of the formula (I): ##STR1## wherein the ring A stands for an optionally substituted 5-membered ring; B stands for an optionally substituted divalent 5- or 6-membered homo- or hetero-cyclic group; X stands for, among others, amino group; Y stands for, among others, hydrogen atom, halogen atom or amino group; Z stands for a divalent aliphatic group having five or less atoms forming straight chain, optionally having nitrogen, whose chain portion may optionally have a hetero-atom; W stands for, among others, --NH--CO-- or --CO--NH--; R.sup.1 stands for an optionally substituted cyclic or chain-like group; COOR.sup.2 stands for an optionally esterified carboxyl group; and p denotes an integer of 1 to 4, provided that when --W--R.sup.1 denotes a moiety represented by the formula: ##STR2## wherein COOR.sup.16 and COOR.sup.17 are, independently, an optionally esterified carboxyl group and n denotes an integer of 1 to 5, p denotes 1, 3 or 4, or a salt thereof, exhibiting highly specific toxicities to various tumor cells and excellent therapeutic effects on methotrexate-resistant tumor cells as well.
化合物的简化
嘧啶衍
生物,其
化学式为(I):##
STR1## 其中,环A代表可选取代的5成员环;B代表可选取代的二价5-或6成员同系或异系环基;X代表
氨基等;Y代表
氢原子、卤素原子或
氨基等;Z代表直链形成的具有五个或更少原子的二价
脂肪基,其中可以有
氮,其链部分可以可选地具有杂原子;W代表--NH--CO--或--CO--NH--等;R.sup.1代表可选取代的环状或链状基团;COOR.sup.2代表可选的
酯化羧基;p表示1到4的整数,但当--W--R.sup.1表示由式子表示的基团时:##
STR2## 其中,COOR.sup.16和COOR.sup.17分别代表可选的
酯化羧基,n表示1到5的整数,p表示1、3或4,或其盐,对各种肿瘤细胞表现出高度特异性毒性,并且对甲
氧苄
氨甲酸耐药性肿瘤细胞具有优异的治疗效果。