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Their structures were elucidated by means of extensive NMR and HR\u2010ESI\u2010MS data analysis. The eight compounds were measured for their cytotoxicity against the human breast carcinoma (MCF\u20107) and human hepatoblastoma (HepG\u20102) cell lines. Seven compounds showed no cytotoxicity to the two cell lines. One compound displayed moderate cytotoxicity against HepG\u20102 and MCF\u20107 with the IC\n                    <jats:sub>50<\/jats:sub>\n                    values of 12.6 and 27.1\u2005\u03bcM, respectively.\n                  <\/jats:p>","DOI":"10.1002\/cbdv.202000178","type":"journal-article","created":{"date-parts":[[2020,5,26]],"date-time":"2020-05-26T04:19:32Z","timestamp":1590466772000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["New Derivatives from Microbial Transformation of\n                    <i>ent<\/i>\n                    \u2010Kaur\u201016\u2010en\u201019\u2010oic Acid by\n                    <i>Cunninghamella echinulata<\/i>"],"prefix":"10.1002","volume":"17","author":[{"given":"Chenggang","family":"Song","sequence":"first","affiliation":[{"name":"College of Plant Science Jilin University  Changchun 130062 P. R. 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