FADH2-C4alpha-hydroperoxide + rifampicin + NADPH = rifampicin hemiaminal + FADH2 + NADP(+) + H2O + H(+)
fadh2-c4alpha-hydroperoxide + rifampicin + nadph = rifampicin hemiaminal + fadh2 + nadp(+) + h2o + h(+)