Cc1oc(C)c2c(=O)cc(-c3ccc4c(c3)OCO4)cc(OC(=O)c3cccc(Br)c3)c12
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?