MPC1001 and Its Analogues: New Antitumor Agents from the Fungus Cladorrhinum Species

Abstract
Eight new compounds, MPC1001 and MPC1001B−H, were isolated from the fungus Cladorrhinum sp. KY4922. Multiple NMR experiments and CD data revealed MPC1001 to be an O-methyl derivative of emestrin, a 15-membered antifungal antibiotic containing a unique epidithiodioxopiperazine skeleton. Other compounds were elucidated to be structurally related novel analogues. MPC1001 and the analogues exerted potent antiproliferative activities against a human tumor cell line.
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