(S)-eriodictyol + reduced [NADPH--hemoprotein reductase] + O2 = (2S)-dihydrotricetin + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
(s)-eriodictyol + reduced [nadph--hemoprotein reductase] + o2 = (2s)-dihydrotricetin + oxidized [nadph--hemoprotein reductase] + h2o + h(+)