1.14.19.66 (S)-N-methylcoclaurine + (R)-N-methylcoclaurine + (S)-coclaurine + [reduced NADPH-hemoprotein reductase] + O2 - 259655 1.14.19.66 2 (S)-N-methylcoclaurine + 2 (R)-N-methylcoclaurine + [reduced NADPH-hemoprotein reductase] + O2 - 259654 1.14.19.66 2 (S)-N-methylcoclaurine + 2 (R)-N-methylcoclaurine + [reduced NADPH-hemoprotein reductase] + O2 enzyme mediates highly regiospecific and stereospecific oxidative phenol coupling to afford natural bisbenzylisoquinoline alkaloids 259654 1.14.19.66 additional information incubation with (S)-N-methylcoclaurine and (R)-coclaurine does not lead to a dimeric product, as well as incubations with (S)-N-methylcoclaurine alone or with either (S)-coclaurine or (R)-coclaurine together or individually 89