Clc1ccc(-c2ccc(-c3nnc(COc4ccc(OCc5nnc(-c6ccc(-c7ccc(Cl)cc7Cl)o6)o5)c(Cl)c4)o3)o2)c(Cl)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?