COc1cccc(NC(=O)CSc2nnc(-c3ccc(/N=C\c4ccc(Cl)cc4)cc3)o2)c1
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?