(1S,3S,6S,7S,8R)-7-hydroxy-6-[(4-methoxyphenyl)methyl]-3-(methylamino)-5-azatricyclo[6.3.1.0(1,5)]dodecan-9-one + NADPH + H(+) = (1S,3S,6S,7S,8S,9S)-6-[(4-methoxyphenyl)methyl]-3-(methylamino)-5-azatricyclo[6.3.1.0(1,5)]dodecane-7,9-diol + NADP(+) — reaction