Cc1cc(=O)oc2cc(OCc3ccc(C(=O)N4CCN(c5ccc([N+](=O)[O-])cc5)CC4)cc3)ccc12
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?