COc1cc(Br)cc(/C=N/NC(=O)C(C)n2cc([N+](=O)[O-])c(OC)n2)c1O
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?