5-甲氧基水杨酸

5-甲氧基水杨酸（英语：5-Methoxysalicylic acid）是一种水杨酸衍生物，分子式C₈H₈O₄，存在于海狸香中^[1]。其与精胺的混合物常作为基质辅助激光解吸/电离（MALDI）质谱法分析寡核苷酸中的基质^[2]。

5-Methoxysalicylic acid
IUPAC名 2-Hydroxy-5-methoxybenzoic acid
别名	5-Methoxysalicylic acid 6-Hydroxy-m-anisic acid 5-Methoxy-2-hydroxybenzoic acid m-Anisic acid MSA
识别
CAS号	89-56-5  Y
PubChem	75787
ChemSpider	68296
SMILES	COC1=CC(=C(C=C1)O)C(=O)O
ChEBI	89830
性质
化学式	C8H8O4
摩尔质量	168.15 g·mol−1
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

参考文献

1. Müller-Schwarze, D.; Houlihan, Peter W. Pheromonal activity of single castoreum constituents in beaver,Castor canadensis. Journal of Chemical Ecology. 1991, 17 (4): 715–734. PMID 24258917. S2CID 29937875. doi:10.1007/BF00994195.
2. Distler, AM; Allison, J. 5-Methoxysalicylic acid and spermine: A new matrix for the matrix-assisted laser desorption/ionization mass spectrometry analysis of oligonucleotides. Journal of the American Society for Mass Spectrometry. 2001, 12 (4): 456–62. PMID 11322192. S2CID 18280663. doi:10.1016/S1044-0305(01)00212-4.