Cn1c2ccccc2c(=O)c2c(=O)n(Cc3ccccc3)c(-c3ccc(F)cc3)nc21
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?