Cc1ccc2c(=O)c(C(=O)c3ccc(F)cc3)cn(CC(=O)NC3CCCCC3)c2n1
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?