aspirin（阿司匹林）（文献参考）

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Composition: acetylsalicylic acid（乙酰水杨酸，即阿司匹林）
Use information: 结直肠癌化学预防药物。综述指出阿司匹林具有最强的结直肠癌化学预防证据支持，但需长期持续使用方可显效。证据来源于随机对照试验及观察性研究。

Reference, supply and purchase path

No verified catalog mapping exists for this reagent; reference status: unknown.

No listed sale configuration is published here. This states neither discontinuation nor current stock.

Store-homepage entry for consultation only — not a direct purchase link.

Submitting an inquiry does not place an order or confirm a purchase.

No exact merchant mapping is verified for this reagent; the reference below is an internal inquiry identifier only.

Reagent：aspirin（阿司匹林）（文献参考）

Stable id：reagent-518（Internal inquiry reference (site id; not a merchant catalog or manufacturer SKU)）

Specification: unknown (not verified)