title: Electrospray ionization mass spectrometry of serine/alanine conjugated 5'-UMP and 3',5'-dithymidine phosphoramidates.
mesh_terms: D000409:Alanine / Q000032:analysis*; D004952:Esters / Q000737:chemistry; D012694:Serine / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization; D013938:Thymidine Monophosphate / Q000032:analysis*; D014542:Uridine Monophosphate / Q000032:analysis*
chemical_list: D004952:Esters; D013938:Thymidine Monophosphate; D012694:Serine; D014542:Uridine Monophosphate; D000409:Alanine