uridine 5'-monophosphate uridine 5'-monophosphate residue UMP residue CHEBI:46347 PDBeChem:U5P URIDINE-5'-MONOPHOSPHATE CHEBI:46470 -U- 5'-uridylic acid residue chebi_ontology canonical ribonucleotide residue uridine 5'-monophosphate(1-) residue