nucleoside diphosphate ribonucleoside diphosphate 292.983 293.083 C5H11O10P2R CHEBI:15046 CHEBI:17668 CHEBI:26557 CHEBI:8845 KEGG:C03723 Ribonucleoside diphosphate chebi_ontology ribonucleoside diphosphate ribonucleoside diphosphates