BiomarkerOf N-methylpyridinium C02724 11374613 | 11570712 | 14351918 | 14363886 13597 InChI=1S/C6H8N/c1-7-5-3-2-4-6-7/h2-6H,1H3/q+1 CHEBI:15761 FOBI:030713 PQBAWAQIRZIWIV-UHFFFAOYSA-N N-methylpyridinium compounds coffee based beverage product legume food product