C=CCN1C(=O)c2ccc(C(=O)N(CC)CC(=O)Nc3cc(Cl)ccc3C)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?