Cc1ccc2cc(CN(Cc3ccc(F)cc3)Cc3nnnn3C3CCCC3)c(O)nc2c1
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?