1.14.13.160 [(1R)-2,2,3-trimethyl-5-oxocyclopent-3-enyl]acetyl-CoA + O2 + NADPH + H+ = [(2R)-3,3,4-trimethyl-6-oxo-3,6-dihydro-1H-pyran-2-yl]acetyl-CoA + NADP+ + H2O - -