Calcium phosphorylcholine-d9 (chloride) is the deuterium labeled Calcium phosphorylcholine chloride. Calcium phosphorylcholine chloride is the main phospholipid component in eukaryotic biofilms. Calcium phosphorylcholine chloride exists in commensal or pathogenic bacteria associated with eukaryotes in prokaryotes. Calcium phosphorylcholine chloride exhibits a surprising range of immunomodulatory properties[1].