COc1ccc(-c2cc(C3CCN(c4ccc(C(C)=O)cc4[N+](=O)[O-])CC3)[nH]n2)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?