CC(C)(C)OC(=O)N1CCN(C(=O)c2ncn(Cc3ccccc3)c2C(=O)N2CCN(C(=O)OC(C)(C)C)CC2)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?