New Sorbicillinoids from the Mangrove Endophytic Fungus <i>Trichoderma reesei</i> SCNU-F0042

Abstract

Three new dimeric sorbicillinoids (1–3) and one new 3,4,6-trisubstituted α-pyrone (5), along with seven analogues (4 and 6–11), were isolated from the mangrove endophytic fungus Trichoderma reesei SCNU-F0042 under the guidance of molecular networking approach. Their chemical structures were established by 1D and 2D NMR HR-ESI-MS and ECD analysis. In a bioassay, compound 2 exhibited moderate SARS-CoV-2 inhibitory activity with an EC50 value of 29.0 μM.

Keywords

• mangrove endophytic fungus
• <i>Trichoderma reesei</i>
• sorbicillinoids
• SARS-CoV-2 inhibitory activity
• molecular networking