Epicriptine or beta-dihydroergocryptine is a dopamine agonist of the ergoline class. It constitutes one third of the mixture known as dihydroergocryptine the other two thirds consisting of alpha-dihydroergocryptine. The alpha differs from the beta form only in the position of a single methyl group which is a consequence of the biosynthesis in which the proteinogenic amino acid isoleucine is replaced by leucine.
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