Journal of Natural Products 2005-Apr
Cremastrine, a pyrrolizidine alkaloid from Cremastra appendiculata.
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Abstracto
A new pyrrolizidine alkaloid, cremastrine (1), was isolated from the bulbs of Cremastra appendiculata. Its configuration was determined by spectroscopic and chemical analyses. Compound 1 inhibited the binding of tritium-labeled N-methylscopolamine to the muscarinic M3 receptor with a K(i) value of 126 nM.