C[N+](C)(C)CC(=O)N/N=C/c1oc(-c2c(O)ccc3ccccc23)c(-c2c(O)ccc3ccccc23)c1[N+](=O)[O-].[Cl-]
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?