Cc1ccccc1-c1ccc(=O)n(CC(=O)Nc2ccc(C(=O)N3CCCC3)cc2)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?