tryptamine + AH2 + O2 => 4-hydroxytryptamine + A + H2O
tryptamine + ah2 + o2 => 4-hydroxytryptamine + a + h2o
tryptamine + AH2 + O2 => 4-hydroxytryptamine + A + H2O
tryptamine + ah2 + o2 => 4-hydroxytryptamine + a + h2o