CC1CN2c3ccc([N+](=O)[O-])cc3CC3(C(=O)N(C)C(=O)N(C)C3=O)C2C(C)O1
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?