CCCCN(CC)C(=O)c1c[nH]c2ccc(S(=O)(=O)Nc3cccc(OC)c3)cc2c1=O
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?