Chlorinated phenolic sesquiterpenoids from the Arctic fungus Nectria sp. B-13

• The chemical constituents of the fungus Nectria sp. B-13 from the soil sample of the Arctic were studied.
• Seven chlorinated phenolic sesquiterpenoids were firstly isolated from the fungus Nectria sp. B-13.
• The chemotaxonomic significance of chlorinated phenolic sesquiterpenoids was discussed.
• Ilicicolin H (9) could be used as the main chemotaxonomic maker of Nectriaceae.

Seven chlorinated phenolic sesquiterpenoids, together with one prenylated 2-pyridyl ketone alkaloid (9) and two monophenols (10 and 11), were isolated from the fungus Nectria sp. B-13 obtained from an Arctic soil sample. Their chemical structures were elucidated using a combination of spectroscopic data (ESI-MS, 1H, and 13C NMR) and comparisons with the published data. This is the first report on the isolation of compounds from pole-derived Nectria sp. B-13. The chemotaxonomic significance of these compounds is discussed.