4-O-demethylbarbatate + S-adenosyl-L-methionine = proatranorin I + S-adenosyl-L-homocysteine
4-o-demethylbarbatate + s-adenosyl-l-methionine = proatranorin i + s-adenosyl-l-homocysteine
4-O-demethylbarbatate + S-adenosyl-L-methionine = proatranorin I + S-adenosyl-L-homocysteine
4-o-demethylbarbatate + s-adenosyl-l-methionine = proatranorin i + s-adenosyl-l-homocysteine