O=C(Nc1ccc2c(c1)Cc1ccccc1-2)[C@@H]1[C@H](C(=O)O)[C@]2(Cl)C(Cl)=C(Cl)[C@@]1(Cl)C2(Cl)Cl
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?