Cc1nn(Cc2ccc(Cl)c(Cl)c2)c(C)c1NC(=O)c1cc(C2CC2)on1
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?