Journal
MOLECULES
Volume 21, Issue 8, Pages -Publisher
MDPI AG
DOI: 10.3390/molecules21080968
Keywords
indole alkaloids; Nauclea officinalis; biosynthetic pathway
Funding
- Postdoctoral Science Foundation of China [2015M582420]
- National Natural Science Foundation of China [31500285]
- Natural Science Foundation of Guangdong Province [2015A030310529]
- Shenzhen Strategic Emerging Industry Development Project Fund [KQCX20140522111508785, CXZZ20150601110000604, ZDSYS201506031617582]
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Three new indole alkaloids, named naucleamide G (1), and nauclealomide B and C (5 and 6), were isolated from the n-BuOH-soluble fraction of an EtOH extract of the leaves of Nauclea officinalis, together with three known alkaloids, paratunamide C (2), paratunamide D (3) and paratunamide A (4). The structures with absolute configurations of the new compounds were identified on the basis of 1D and 2D NMR, HRESIMS, acid hydrolysis and quantum chemical circular dichroism (CD) calculation. According to the structures of isolated indole alkaloids, their plausible biosynthetic pathway was deduced.
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