CC1=C(C(=O)N(C(C)C)C(C)C)CC(C(=O)N(C(C)C)C(C)C)=C(C)N1
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?