The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Effect of pyridoxal phosphate on toxicity and antitumor activity of mitomycin C and 4-deoxypyridoxine hydrochloride in rats. Preliminary observations》. Authors are Fujimoto, Shigeru.The article about the compound:5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloridecas:148-51-6,SMILESS:OC1=C(C)C(CO)=CN=C1C.[H]Cl).Quality Control of 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride. Through the article, more information about this compound (cas:148-51-6) is conveyed.
In rats bearing ascites hepatoma, combined therapy with mitomycin C and vitamin B6 arrested leukopenia, but failed to alleviate liver dysfunction and anemia. The growth of subcutaneous tumors was not stimulated by vitamin B6. Tumor growth was inhibited for 2 weeks after administration of 4-deoxypyridoxine-HCl, an antagonist of vitamin B6, to rats fed a diet free of vitamin B6. The administration of vitamin B6 did not lessen the effect of mitomycin C on subcutaneous tumors in rats. Vitamin B6 might counteract leukopenia, a side effect of antitumor agents, by an improvement in metabolism of proteins.
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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia