Microtesla Signal Amplification by Reversible Exchange Enables Simultaneous over 5% Polarization of 77Se and 15N at Natural Abundance in a Selenium–Nitrogen Heterocycle - Alexey S. Kiryutin; Danil A. Markelov; Zhanna V. Matsulevich; Irina D. Kosenko; Nikolay V. Kireev; Ivan A. Godovikov; Alexandra V. Yurkovskaya (Journal of the American Chemical Society, 2025)