Rugulosuvines A and B, Diketopiperazine Alkaloids of Penicillium rugulosum and Penicillium piscarium Fungi

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Two diketopiperazine alkaloids, rugulosuvines A and B (tryptophan and phenylalanine are their precursors), were isolated and purified from a culture liquid of Penicillium rugulosum VKM F-352 and Penicillium piscarium VKM F-325 fungi. Physical and physicochemical studies showed the absolute structure of rugulosuvine A. The absolute structure of rugulosuvine B was demonstrated to be identical to that of rugulosuvine A.

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