(S)-5'-oxoaverantin + H(+) => (1'S,5'S)-averufin + H2O
(s)-5'-oxoaverantin + h(+) => (1's,5's)-averufin + h2o
(S)-5'-oxoaverantin + H(+) => (1'S,5'S)-averufin + H2O
(s)-5'-oxoaverantin + h(+) => (1's,5's)-averufin + h2o