Technical note: Epimerization of ergopeptine alkaloids in organic and aqueous solvents1,2 (original) (raw)

2000

Abstract

Purifiedergopeptinealkaloidsareoften used in studies related to tall fescue toxicosis without regard to epimerization that occurs when ergopeptines are solvated. The objectives of this study were to mea- sure the rates of α-ergocryptine epimerization to α- ergocryptinine at room temperature and at −40°C, and to measure the rate of ergovaline epimerization to ergo- valinine at 37°C. α-Ergocryptine tartrate was stable (<

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