Access to those structures could be achieved by:

• DOUBLE BOND FUNCTIONALIZATION

  * Epoxidation

  * Hydroxylation

  * Michael-type additions

• REDUCING THE AMIDE GROUP

  * Reduction to methylene

  * Reduction to hydroxy

• RELEASING THE LATENT FUNCTIONALITY OF THE SIDE CHAIN

  * Acids

  * Aldehydes

  * Alkoxy acids

  * Alkoxy aldehydes