label: sterigmatocystin + S-adenosyl-L-homocysteine + H(+) => 6-demethylsterigmatocystin + S-adenosyl-L-methionine
label_lc: sterigmatocystin + s-adenosyl-l-homocysteine + h(+) => 6-demethylsterigmatocystin + s-adenosyl-l-methionine