Cc1cccc(CN2C(=O)[C@@H]3Cc4c([nH]c5ccccc45)C(C)(C)N3C2=O)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?