3-Methylpyrazole is used as a nitrification inhibitor of nitrification in soil[1].
3-Methylpyrazole could inhibit the metabolism of MAM by rat liver microsomes[2].
[1]. G.W. McCarty, et al. Inhibition of nitrification in soil by heterocyclic nitrogen compounds. Biol Fertil Soils (1989) 8:204-211. [2]. Fiala ES, et al. Differential effects of 4-iodopyrazole and 3-methylpyrazole on the metabolic activation of methylazoxymethanol to a DNA methylating species by rat liver and rat colon mucosa in vivo. J Cancer Res Clin Oncol. 1987;113(2):145-50.