4-hydroxy-3-methylbut-2-enyl diphosphate reductase activity
4-hydroxy-3-methylbut-2-enyl diphosphate reductase activity
4-hydroxy-3-methylbut-2-en-1-yl diphosphate reductase activity
4-hydroxy-3-methylbut-2-en-1-yl diphosphate reductase activity