Preferred Label : pyrimido(4,5-d)pyrimidine-2,4,5,7-(1H,3H,6H,8H)-tetraone ribonucleoside;
MeSH note : structure in first source;
MeSH synonym : PPT ribonucleoside;
Is substance : O;
Origin ID : C522073;
UMLS CUI : C1959414;
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