7-acetyl-epi-neemfruitin B + AH2 + H2O = (1S,3bR,4R,5aR,9aR,9bR,11aS)-1-[(4R)-5-[(2S)-3,3-dimethyloxiran-2-yl]-1,4-dihydroxybutan-2-yl]-3b,6,6,9a,11a-pentamethyl-7-oxo-1H,2H,3bH,4H,5H,5aH,6H,7H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-4-yl acetate + acetate + A + H(+)