PMC:7291971 / 83800-83810 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T1667","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"},{"id":"T87896","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"}],"text":"purin-9-yl"}