O=C(Cn1cnc2c(nnn2Cc2ccc(F)cc2)c1=O)Nc1ccc2c(c1)OCCO2
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?