COc1ccccc1C1c2c(-c3ccc(Cl)cc3)n[nH]c2C(=O)N1c1ccc(C)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?