| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| L | ANTINEOPLASTIC AND IMMUNOMODULATING AGENTS | 抗肿瘤药和免疫机能调节药 |
| L01 | ANTINEOPLASTIC AGENTS | 抗肿瘤药 |
| L01B | ANTIMETABOLITES | 代谢拮抗药 |
| L01BB | Purine analogues | 嘌呤同系物类 |
| L01BB02 | mercaptopurine | 巯嘌呤（乐疾宁，麦卡累金，6-巯基嘌呤） |
| L01BB03 | tioguanine | 硫鸟嘌呤 |
| L01BB04 | cladribine | 克拉屈滨 |
| L01BB05 | fludarabine | 氟达拉滨 |
| L01BB06 | clofarabine | 氯法拉滨 |
| L01BB07 | nelarabine | 奈拉滨 |