NMR SPECTROSCOPY FOR DIAGNOSIS AND MONITORING OF METABOLITES IN SOME INBORN ERRORS OF METABOLISM: OTC DEFICIENCY, GALACTOSEMIA AND ALKAPTONURIA Vulturar R 1 , Nicolescu A 2 , Avram P 3 , Deleanu C 4 1 Dept Cell Molec Biol, "I Hatieganu" UMP, Cluj-Napoca, Romania 2 "P.Poni" Inst Macromolec Chem, Iasi, Romania 3 "A.Rusescu" Inst Mother and Child Care, Bucharest, Romania 4 "C.D. Nenitescu" Inst Org Chem, Bucharest, Romania