SEARCH Articles Figures Tables Catalysts Grubbs catalyst Grubb Grubbs Grubbs-Hoveyda catalyst carbene reactions Grubbs-Hoveyda second-generation catalyst Grubbs’ catalyst Hoveyda Hoveyda catalyst Hoveyda-Grubbs Hoveyda-Grubbs II catalyst Metathesis Hoveyda-Grubbs catalyst Ring-closing metathesis reaction Hoveyda-Grubbs catalyst