C[N+]1(C)C/C(=C\C=C\c2ccccc2)C(=O)/C(=C/C=C/c2ccccc2)C1.[I-]
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?