Cn1cc([C@@H]2C[C@H]3CN(C4CCCC4)C(=O)[C@]34CCCN24)c(-c2ccccc2)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?