CCn1c(=O)n(CC)c2cc(N3CCCC3)c(NC(=O)c3ccc(C)c([N+](=O)[O-])c3)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?