PMC:7696151 / 3383-3519 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T28","span":{"begin":0,"end":136},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The two chemical structures differ only for the hydroxyl group at the end of N-ethyl side chain (represented in blue color in Figure 1)."}