N#CC(c1ccccc1)N(CCc1ccccc1)C(=O)c1ccc(C(=O)N(CCc2ccccc2)C(C#N)c2ccccc2)cc1
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?