An antitumor composition was prepared by admixing a 5-fluorohexahydropyrimidine of the formula (I)
wherein R' is a lower alkyl group and R2 is a hydrogen atom or a lower alkyl group, and a pyrimidine nucleic acid base and/or the riboside thereof. Thus, the antitumor activity of the 5-fluorohexahydropyrimidine of the formula (I) is remarkably increased by the joint use of a pyrimidine nucleic acid base and/or the riboside thereof, which has little antitumor activity.
将式(I)的 5-
氟六氢
嘧啶与
嘧啶核酸碱和/或其核苷混合,制备出一种抗肿瘤组合物。
其中 R' 是低级烷基,R2 是氢原子或低级烷基,以及
嘧啶核酸碱基和/或其核苷。因此,联合使用抗肿瘤活性较低的
嘧啶核酸碱和/或其核苷,可显著提高式(I)的 5-
氟六氢
嘧啶的抗肿瘤活性。