CCCc1ccc(OC(=O)c2sc3ncn(Cc4cccc(F)c4)c(=O)c3c2C)cc1
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?