pyridine + S-adenosyl-L-methionine => N-methylpyridinium + S-adenosyl-L-homocysteine
pyridine + s-adenosyl-l-methionine => n-methylpyridinium + s-adenosyl-l-homocysteine
pyridine + S-adenosyl-L-methionine => N-methylpyridinium + S-adenosyl-L-homocysteine
pyridine + s-adenosyl-l-methionine => n-methylpyridinium + s-adenosyl-l-homocysteine