Cc1ccc2c(c1)c1c(c(=O)n(-c3ccccc3)c(=O)n1CC(=O)c1ccc(Cl)cc1)n2C
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?