CO[C@H]1COC(=O)[C@@H](Cc2ccccc2)NC(=O)[C@@H](C)COC(=O)CCC[C@@H]1C
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?