PubMed:12433491 / 237-374 JSONTXT

{"project":"sentences","denotations":[{"id":"TextSentencer_T3","span":{"begin":0,"end":137},"obj":"Sentence"},{"id":"T3","span":{"begin":0,"end":137},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"In a second approach, the aminopropyl group was introduced via Williamson etherification with N-phthalyl-protected 3-bromo-1-propylamine."}