N-methylnicotinate is an iminium betaine that is the conjugate base of N-methylnicotinic acid, arising from deprotonation of the carboxy group. It has a role as a plant metabolite, a food component and a human urinary metabolite. It is an alkaloid and an iminium betaine. It is functionally related to a nicotinate. It is a conjugate base of a N-methylnicotinic acid. Trigonelline (1-methylpyridinium-3-carboxylate), an alkaloid present in coffee and fenugreek seed, exhibits phytoestrogenic, anti-adipogenesis, and anticancer activities, it also can reduce early glucose and insulin responses. Trigonelline has inhibition of the Nrf2 transcription factor and PPAR-γ.