Journal
FITOTERAPIA
Volume 141, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fitote.2020.104469
Keywords
Trichoderma; Terpene; Sesquiterpene; Cyclonerane; Isocoumarin
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Funding
- Natural Science Foundation for Distinguished Young Scholars of Shandong Province [JQ201712]
- National Natural Science Foundation of China [31670355]
- Youth Innovation Promotion Association of CAS [2013138]
- Shuangbai Plan of Yantai [2018-3]
- Taishan Scholar Project Special Funding [tsqn201909164]
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Two new cyclonerane sesquiterpenes, (10E)-isocyclonerotriol (1) and (10Z)-isocyclonerotriol (2), and one new isocoumarin derivative, trichophenol A (3), were isolated from Trichoderma citrinoviride A-WH-20-3, an endophyte from the marine red alga Laurencia okamurai. Their structures and relative configurations were assigned by spectroscopic techniques, highlighted by using Sarotti's DP4+ sheet to confirm the cyclopentane ring. The absolute configuration of 1 was established by comparison of experimental and calculated specific rotation data. Compounds 1 and 2 represent the first occurrence of ring-isomerized cycloneranes. Compound 3 is the first 3-phenylisocoumarin derivative from Trichoderma and features inhibition of several marine-derived bacteria and phytoplankton species.
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