butyrolactone II + dimethylallyl diphosphate <=> butyrolactone I + diphosphate
butyrolactone ii + dimethylallyl diphosphate <=> butyrolactone i + diphosphate
butyrolactone II + dimethylallyl diphosphate <=> butyrolactone I + diphosphate
butyrolactone ii + dimethylallyl diphosphate <=> butyrolactone i + diphosphate