Two new dioxopiperazine derivatives, arestrictins A and B, isolated from Aspergillus restrictus and Aspergillus penicilloides |
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Authors: | Itabashi Takeshi Matsuishi Natsuna Hosoe Tomoo Toyazaki Norihiro Udagawa Shun-Ichi Imai Toshimichi Adachi Mitsuru Kawai Ken-Ichi |
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Affiliation: | Faculty of Pharmaceutical Sciences, Hoshi University, Tokyo, Japan. |
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Abstract: | In the course of searching for bioactive substances, two new dioxopiperazine derivatives, arestrictins A (1) and B (2), were isolated along with the known dioxopiperazine, cristatin A (3), and the known peptide, asperglucide (4), from the organic extract of the xerophilic fungi, Aspergillus restrictus and Aspergillus penicilloides. The absolute structures of 1 and 2, except for the configuration of the secondary alcohol in 1, were established by spectroscopic and chemical investigation. The absolute configuration of cristatin A (3) was also determined. |
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