The six natural pyrethrins (II)–(VII) and (+)-allethronyl (+)-trans-chrysanthemate (VIII) have the same absolute configurations (o.r.d. and c.d.) at C-4; X-ray structure determination of the title derivative shows this to be 4(S) and provides conformational information.
M. J. Begley, L. Crombie, D. J. Simmonds and D. A. Whiting, J. Chem. Soc., Chem. Commun., 1972, 1276 DOI: 10.1039/C39720001276
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