N,N-dihydroxy-L-trihomomethionine + oxidized [NADPH--hemoprotein reductase] + H2O + H(+) => N-hydroxy-L-trihomomethionine + reduced [NADPH--hemoprotein reductase] + O2
n,n-dihydroxy-l-trihomomethionine + oxidized [nadph--hemoprotein reductase] + h2o + h(+) => n-hydroxy-l-trihomomethionine + reduced [nadph--hemoprotein reductase] + o2