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