European Pharmacopoeia (EP) Reference Standard Synonym(s): Folinic acid calcium salt hydrate; 5-Formyl-5,6,7,8-tetrahydrofolic acid calcium salt; 5-Formyl-5,6,7,8-tetrahydropteroyl-L-glutamic acid calcium salt; 5-HCO-H4PteGlu; Calcium folinate; Citrovorum factor calcium salt; Leucovorin...