CCN(CC)c1ccc(NC(=O)c2c(C)nn(-c3ccc(F)cc3)c2-n2cccc2)c(C)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?