PMC:7291971 / 77216-77226 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T1531","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"},{"id":"T61490","span":{"begin":0,"end":10},"obj":"CHEBI:30756;CHEBI:30756"}],"text":"purin-9-yl"}