PMC:7463108 / 5220-5321 JSONTXT

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T10","span":{"begin":58,"end":66},"obj":"Chemical"}],"attributes":[{"id":"A10","pred":"chebi_id","subj":"T10","obj":"http://purl.obolibrary.org/obo/CHEBI_119915"}],"text":" opioid market in the U.S. The synthetic opioids, such as fentanyl, are several orders of magnitude m"}

{"project":"LitCovid-PubTator","denotations":[{"id":"89","span":{"begin":58,"end":66},"obj":"Chemical"}],"attributes":[{"id":"A89","pred":"tao:has_database_id","subj":"89","obj":"MESH:D005283"}],"namespaces":[{"prefix":"Tax","uri":"https://www.ncbi.nlm.nih.gov/taxonomy/"},{"prefix":"MESH","uri":"https://id.nlm.nih.gov/mesh/"},{"prefix":"Gene","uri":"https://www.ncbi.nlm.nih.gov/gene/"},{"prefix":"CVCL","uri":"https://web.expasy.org/cellosaurus/CVCL_"}],"text":" opioid market in the U.S. The synthetic opioids, such as fentanyl, are several orders of magnitude m"}