Some references:

ChemIDplus 5266-20-6: ChemIDplus - 5266-20-6 - Lithium orotate - Similar structures search, synonyms, formulas, resource links, and other chemical information.
Christensen 1983: Orotic Acid Sodium Salt in Kidney Stones and Urinary Deposits
Dewar 1971: Cambridge Journals Online - Psychological Medicine - Abstract - Effect of lithium administration on RNA metabolism in rat brain injected with radio labeled orotic acid
EFSA 2009: EFSA - Opinion of the Scientific Committee/Scientific Panel: Orotic acid salts as sources of orotic acid and various minerals added for nutritional purposes to food supplements
Grosse 1980: The effect of orotic acid and sodium orotate on organ cultures of the hippocampus of embryonic rats
Hilal 2005: Electronic structure of orotic acid III geometric feature and thermal properties of some transition metal orotic acid complexes
Hur 2002: Molecular dynamic study of orotidine-5′-monophosphate decarboxylase in ground state and in intermediate state: A role of the 203–218 loop dynamics
Karkishchenko 1983: Anxiolytic effect of potassium orotate
Karkishchenko 1986: Quantitative evaluation of the anxiolytic and nootropic effects of potassium orotate in a wide range of doses
Kilomentor (Grey Literature): Possible Uses of the Pharmaceutically -Acceptable Orotic Acid
Kling 1978: Rat brain and serum lithium concentrations after acute injections of lithium carbonate and orotate - KLING - 2011 - Journal of Pharmacy and Pharmacology - Wiley Online Library
Lutz 2001: Acta Crystallographica Structure Reports Online - Lithium Orotate Monohydrate
Musick 1981: Structural features of the phosphoribosyltransferases and their relationship to the human deficiency disorders of purine and pyrimidine metabolism.
Padmarao 2013: Coordination Chemistry of Orotic acid - International Journal of Engineering Science Invention
RTECS RM3180000: RTECS NUMBER RM3180000 Orotic Acid - Chemical Toxicity Database
Sartori 1986: Lithium orotate in the treatment of alcoholism and related conditions
Smith 1976: LITHIUM OROTATE, CARBONATE AND CHLORIDE: PHARMACOKINETICS, POLYDIPSIA AND POLYURIA IN RATS
Smith 1979: Kidney function and lithium concentrations of rats given an injection of lithium orotate or lithium carbonate - SMITH - 2011 - Journal of Pharmacy and Pharmacology - Wiley Online Library
Wenzel 1976: The effect of orotic acid and orotic acid derivatives on the in vitro differentiation of hippocampus neurons-morphometric and electron microscopic studies of ribosomes
Wu 2002: Crystal Structures of Inhibitor Complexes Reveal an Alternate Binding Mode in Orotidine-5′-monophosphate Decarboxylase