The structure elucidation of emestrin (1), a macrocyclic epidithioxopiperazine derivative isolated from the mycelial acetone extract of Emericella striata, is reported, based on its 1H and 13C n.m.r. spectra and an X-ray crystallographic study of its methanol solvate; its absolute configuration was established by its c.d. spectrum.
H. Seya, S. Nakajima, K. Kawai and S. Udagawa, J. Chem. Soc., Chem. Commun., 1985, 657 DOI: 10.1039/C39850000657
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