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Ergogaline, a new ergot alkaloid, produced by Claviceps purpurea: isolation, identification, crystal structure and molecular conformation

1994; Royal Society of Chemistry; Issue: 8 Linguagem: Inglês

10.1039/p29940001861

2050-8239

Ladislav Cvak, Alexandr Jegorov, Petr Sedmera, Vladimı́r Havlı́ček, Jan Ondráček, Michal Hušák, Svetlana Pakhomova, Bohumil Kratochvíl, Joachim Granzin,

Turfgrass Adaptation and Management

A new peptide ergot alkaloid containing L-homoisoleucine has been isolated from ergot sclerotia of the field-growing parasitic fungus Claviceps purpurea. The molecular and crystal structures have been studied by X-ray analysis [ergogaline monohydrate, monoclinic space group P21 with two molecules per unit cell of the dimensions a= 9.972(1), b= 10.902(1) and c= 14.761 (1)Å, β= 94.05(1)°] and compared with the structures in solution as determined by 2D NMR spectroscopy.