CCCn1c(C(C)Nc2nc(-c3ccc(Cl)c([N+](=O)[O-])c3)cs2)nc2cc(Cl)c(N3CCCCC3)cc21
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?