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Kölbel K, Ihling CH, Sinz A.Kölbel K, et al.Angew Chem Int Ed Engl. 2012 Dec 7;51(50):12602-5. doi: 10.1002/anie.201205308. Epub 2012 Oct 26.Angew Chem Int Ed Engl. 2012.PMID: 23109332