Structural implications of the paramagnetically shifted NMR signals from pyridine H atoms on synthetic nonheme FeIV=O complexes. - Rasheed W; Fan R; Abelson CS; Peterson PO; Ching WM; Guo Y; Que L Jr (Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 2019)