Combined homogeneous and heterogeneous hydrogenation to yield catalyst-free solutions of parahydrogen-hyperpolarized [1-13C]succinate. - Eills J; Picazo-Frutos R; Burueva DB; Kovtunova LM; Azagra M; Marco-Rius I; Budker D; Koptyug IV (Chemical communications (Cambridge, England), 2023)