CCNc1cc(N2CCN(S(=O)(=O)c3ccc4c(c3)CCCC4)CC2)ccc1[N+](=O)[O-]
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?