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5-取代苄基-2,4-二氨基嘧啶(Ⅰ)对微生物来源的二氢叶酸还原酶(DHFR)具有较强的抑制作用。它们对微生物来源的DHFR的抑制作用强弱主要与取代基X的限制的立体参数MR′有显著的相关。
The 5-substituted benzyl-2,4-diaminopyrimidine (I) has a strong inhibitory effect on the dihydrofolate reductase (DHFR) derived from microorganisms. Their inhibitory effect on microbial-derived DHFR is mainly related to the restricted stereoscopic parameter MR ’of substituent X.