(2S,3S)-versiconal hemiacetal acetate + NADP(+) + H2O => 1'-hydroxyversicolorone + NADPH + O2 + H(+)
(2s,3s)-versiconal hemiacetal acetate + nadp(+) + h2o => 1'-hydroxyversicolorone + nadph + o2 + h(+)