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