O=C(O)c1ccc(-c2ccc(/C=C3\NC(=O)N(Cc4ccc(Cl)cc4)C3=O)o2)cc1Cl
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?