6-demethylsterigmatocystin + S-adenosyl-L-methionine = sterigmatocystin + S-adenosyl-L-homocysteine + H(+)
6-demethylsterigmatocystin + s-adenosyl-l-methionine = sterigmatocystin + s-adenosyl-l-homocysteine + h(+)
"demethylsterigmatocystin 6-O-methyltransferase"
"demethylsterigmatocystin 6-o-methyltransferase"