CORD-19:f4f0d1b957340175fd951c8fa9c27815dd589f26 / 23985-24252 JSONTXT

{"project":"CORD-19-Sentences","denotations":[{"id":"TextSentencer_T163","span":{"begin":0,"end":267},"obj":"Sentence"},{"id":"TextSentencer_T163","span":{"begin":0,"end":267},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The crude methanol extract was partitioned with water/ethyl acetate (EtOAc) (1:1), mixed with 350 g silical gel 60 N (Timely, Japan) for packing in an open column, and eluted with different ratios of hexane/EtOAc to afford 5 fractions (4:1, 3:1, 7:3, 13:7, 3:2, A-E)."}