CCNc1ccc(C(=O)OCC(=O)c2cc(C)n(Cc3ccc4c(c3)OCO4)c2C)cc1[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?