(2S)-liquiritigenin + reduced [NADPH--hemoprotein reductase] + O2 = (2R,3S)-2,4',7-trihydroxyisoflavanone + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
(2s)-liquiritigenin + reduced [nadph--hemoprotein reductase] + o2 = (2r,3s)-2,4',7-trihydroxyisoflavanone + oxidized [nadph--hemoprotein reductase] + h2o + h(+)