CCCc1nnc(NC(=O)c2cn(CC)c3cc(N4CCN(C)CC4)c(F)cc3c2=O)s1
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?