CCCCN1C(=O)C2C(c3ccc(OC)cc3O)NC(CC(C)C)(C(=O)O)C2C1=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?