COc1ccc(CCNc2c([N+](=O)[O-])nn(-c3cccc(C)c3)[n+]2[O-])cc1OC
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?