On the Stereochemistry of the Acylpyrroles from Senecio Species The isolation of two isomeric acylpyrroles (5 and 6) leads to the elucidation of the so far unsolved stereochemistry of this new class of pyrrolizidine‐alkaloid‐derivatives, which seems transferable to the configurations of 7 and 8. Copyright © 1978 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim