N#C/C(=C\c1cc(Br)c(O)c(Br)c1)c1nc2ccccc2c(=O)[nH]1
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?