Provided are compounds of the following formulae: A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl and B is a purine or pyrimidine base. A 4'-phosphonomethoxytetrahydrofuranyl-1'-purine-pyrimidine of the formula ##STR2## wherein X and X' are the same or different and are hydrogen or alkyl, Y and Z are the same or different and are hydrogen, hydroxyl or alkyl or Y+Z is an alkenyl, an epoxide or cyclopropyl, and B is a purine or pyrimidine base.
提供以下式子的化合物:公式为A的
磷酸甲氧甲氧甲基
嘌呤/
嘧啶衍
生物##STR1##其中X和X'相同或不同,是氢或烷基。R和R'相同或不同,是氢、烷基、羟基烷基或脂肪酰基,B是一种
嘌呤或
嘧啶碱基。公式为##STR2##其中X和X'相同或不同,是氢或烷基,Y和Z相同或不同,是氢、羟基或烷基,或Y+Z是烯烃、
环氧化物或环丙基,B是一种
嘌呤或
嘧啶碱基。