Seven-membered heterocyclic nucleosides used to inhibit the deamination enzyme responsible for the inactivation of arabinosylcytosine (ara--C). Preferred nucleosides containing a seven-member aglycone are as follows: ##STR1## Preferred aglycones are as follows: ##STR2## Active components utilized against pyrimidine deaminases from mammalian tissues (mouse kidney and human liver) showed optimum advantage when compared with tetrahydrouridine (THU).
用于抑制负责去
氨基化阿拉伯核苷
胞嘧啶(ara-C)失活的酶的七元杂环核苷。首选含有七元缺糖基的核苷如下:首选的缺糖基如下:从哺乳动物组织(小鼠肾脏和人类肝脏)中利用的活性组分对
嘧啶去
氨基酶显示出与四
氢尿
嘧啶(THU)相比具有最佳优势。