12alpha,13alpha-dihydroxyfumitremorgin C + dimethylallyl diphosphate = fumitremorgin B + diphosphate
12alpha,13alpha-dihydroxyfumitremorgin c + dimethylallyl diphosphate = fumitremorgin b + diphosphate
12alpha,13alpha-dihydroxyfumitremorgin C + dimethylallyl diphosphate = fumitremorgin B + diphosphate
12alpha,13alpha-dihydroxyfumitremorgin c + dimethylallyl diphosphate = fumitremorgin b + diphosphate