PMC:7291971 / 72650-72660 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T1453","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"},{"id":"T41826","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"}],"text":"purin-9-yl"}