Eremophilane‐Type Sesquiterpenoids from the Fermentation Broth of Plant Endophytic Fungus Pestalotiopsis photiniae Isolated from the Chinese Podocarpaceae Plant Podocarpus macrophyllus

Two new sesquiterpenoid esters, pestalotiopins B and C (1 and 2, resp.) related to the eremophilane class, together with one known compound, berkleasmin C (3), were isolated from the fermentation broth of the plant endophytic fungus Pestalotiopsis photiniae. Their structures and relative configurations were elucidated by extensive spectroscopic analysis including 1D- and 2D-NMR (HSQC, HMBC, and NOESY), and MS experiments. Compound 1 has an interesting lactam structure, and this type of sesquiterpenoid with a lactam structure is reported for the first time.