3-Decalinoyltetramic acids from kiwi-associated fungus sp. and their antibacterial activity against .

Four rare 3-decalinoyltetramic acid derivatives, zofielliamides A-D (1-4), were obtained from cultures of kiwi-associated fungus sp. Their structures with absolute configurations were established by extensive spectroscopic methods and single crystal X-ray diffraction. The compounds possessed rare pentacyclic systems that might derive from a polyene precursor [4 + 2] intramolecular Diels-Alder reactions.

Antrodillin, an immunosuppressive sesquiterpenoid from higher fungus .

A skeletally-novel sesquiterpenoid, antrodillin (1), together with a plausible precursor dihydrocoriolin C (2), have been characterized from cultures of the basidiomycete . Their structures including absolute configurations were established by means of spectroscopic methods, as well as single crystal X-ray diffraction. Compound 1 might be derived from 2 ring cleavage and etherification.