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Three new diterpenes and two new sesquiterpenoids from the endophytic fungus Trichoderma koningiopsis A729.

Bioorganic Chemistry 2019 Februrary 6
Three new diterpenes koninginols A-C (1-3) and two new sesquiterpenoids 11-hydroxy-15-drimeneoic acid (4), koninginol D (5), together with twelve known compounds (6-17) were isolated from the endophytic fungus Trichoderma koningiopsis A729 derived from Morinda officinalis. Their structures were fully assigned with the aid of extensive spectroscopic analysis and reported data from the previous literatures. Koninginols A and B were disclosed as intriguing diterpene alkaloids, whereas the koninginol C was disclosed as one of the two examples of harziandione diterpene. All the isolates were evaluated for their antitumor activity, and compounds 1-2, 4-6, 11-13, 16-17 were evaluated for their antibacterial activity, wherein the new compounds 1 and 2 exhibited significant antibacterial activity against Bacillus subtilis with MIC values of 10 and 2 μg/mL, respectively.

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