demethylspheroidene + S-adenosyl-L-methionine = spheroidene + S-adenosyl-L-homocysteine + H(+)
demethylspheroidene + s-adenosyl-l-methionine = spheroidene + s-adenosyl-l-homocysteine + h(+)
"demethylspheroidene O-methyltransferase"
"demethylspheroidene o-methyltransferase"