COc1ccc(NC(=O)c2sc3nc(C)c(C(=O)Nc4ccc(Cl)cc4)c(-c4ccc(Br)cc4)c3c2N)cc1
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?