CCOc1ccc(Br)cc1C1C(C(=O)OC)=C(N)Oc2cc(N(C)C)ccc21
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?