Journal
ORGANIC LETTERS
Volume 19, Issue 1, Pages 258-261Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b03557
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Funding
- Program for New Century Excellent Talents in University, State Education Ministry of China [NCET-2008-0224]
- National Natural Science Foundation of China [31200258, 31370372, 31270395, 81573316, 81641129]
- National Science and Technology Project of China [2011ZX09102-004]
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Two new functionalized ergostane-type steroids, phomopsterones A (1) and B (2), were isolated from the plant-derived Phomopsis sp. TJ507A. Their structures were determined on the basis of spectroscopic data, a modified Mosher's method, X-ray crystallographic analysis, and quantum chemical calculations. Compound 1 is an unprecedented ergosteroid featuring a, rearranged bicyclo[3.3.1]nonane motif resulting from B-ring scission and a subsequent 180 degrees rotation of the ring A during biosynthesis. Compound 2 exhibited anti-inflammatory activity.
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