Lovastatin Nonaketide Synthase Catalyzes an Intramolecular Diels−Alder Reaction of a Substrate Analogue AuclairKarine SutherlandAndrew KennedyJonathan WitterDavid J. Van den HeeverJohan P. HutchinsonC. Richard VederasJohn C. 2000 Lovastatin Nonaketide Synthase Catalyzes an Intramolecular Diels−Alder Reaction of a Substrate Analogue