CC(=O)c1cccc(NC(=O)C(C)n2c(=O)cc(-c3ccccc3)c3c(C)nn(C)c32)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?