CCc1ccc2c(c1)c(=O)c(C(=O)c1ccc(C)cc1)cn2CC(=O)Nc1ccccc1C
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?