CCn1nc(C)c2c(-c3ccccc3)cc(=O)n(C(C)C(=O)NCCc3ccc(Cl)cc3)c21
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?