这个词是什么意思？
A nucleoside that substitutes for thymidine in DNA and thus acts as an antimetabolite. It causes breaks in chromosomes and has been proposed as an antiviral and antineoplastic agent. It has been given orphan drug status for use in the treatment of primary brain tumors.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D001973 · MeSH 2026。
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