[C-]#[N+]C(=C\c1ccc(O)cc1)/C(=C/c1ccc(O)cc1)[N+]#[C-]
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?