A purine analogue, C5H4N4S, that acts as an antimetabolite by interfering with purine synthesis, used primarily in the treatment of acute leukemia.
颈基嘌呤一种含硫类似物，化学式为c5h4n4s，是一种能干扰嘌呤的合成的。
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Pemetrexed is a multitargeted antimetabolite that has shown activity in malignant pleural mesothelioma and NSCLC, which has been approved in more than 70 countries.