NC(=O)CC1NC(=O)c2cc([N+](=O)[O-])cc(I)c2OCCC(C(N)=O)NC(=O)[C@@H]2CCCN2C1=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?