[Isolation of Penicillium DIERCKX 1901--a producer of diketopiperazine alkaloids rokefortin and 3,12-dihydrokefortin--from permafrost].

Secondary metabolites of the three strains of Penicillium aurantiogriseum, isolated from permafrost sediments, were identified. It was found that these fungi synthesized diketopiperazine alkaloids roquefortine and 3,12-dihydroroquefortine. The strain VKM FW-766 synthesized alkaloids in in the course of certain growth-related processes.