5-Hydroxy-3,4,4-trimethyl-delta<sup>2</sup>-pimelyl-CoA-delta-lactone → delta<sup>2,5</sup>-3,4,4-Trimethylpimelyl-CoA derivative<br><br>Comments:<br>CoA ligation to the terminal carboxyl group occurs prior to spontaneous dehydration to produce a double bond, but is bypassed in this rule for simplification.
