1,2-dihydro-alpha-santonin + NADP(+) <=> alpha-santonin + NADPH + H(+)
1,2-dihydro-alpha-santonin + nadp(+) <=> alpha-santonin + nadph + h(+)
1,2-dihydro-alpha-santonin + NADP(+) <=> alpha-santonin + NADPH + H(+)
1,2-dihydro-alpha-santonin + nadp(+) <=> alpha-santonin + nadph + h(+)