COc1ccc(-c2c(N)n(-c3cc(OC)cc(OC)c3)c(=O)c3cc([N+](=O)[O-])ccc23)cc1
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?