(3S)-9,10-dihydroxy-7-methoxy-3-(2-oxopropyl)-1H,3H,4H-naphtho[2,3-c]pyran-1-one + NADPH + O2 + H(+) => semiviriditoxin + NADP(+) + H2O
(3s)-9,10-dihydroxy-7-methoxy-3-(2-oxopropyl)-1h,3h,4h-naphtho[2,3-c]pyran-1-one + nadph + o2 + h(+) => semiviriditoxin + nadp(+) + h2o
(3S)-9,10-dihydroxy-7-methoxy-3-(2-oxopropyl)-1H,3H,4H-naphtho[2,3-c]pyran-1-one + NADPH + O2 + H(+) => semiviriditoxin + NADP(+) + H2O
(3s)-9,10-dihydroxy-7-methoxy-3-(2-oxopropyl)-1h,3h,4h-naphtho[2,3-c]pyran-1-one + nadph + o2 + h(+) => semiviriditoxin + nadp(+) + h2o