O=C1CC(NC(=O)C(F)(F)F)c2c(Br)sc(N3CCC(c4ccccc4)CC3)c21
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?