O=C(NCCCN1CCOCC1)c1ccccc1N1C(=O)[C@@H]2Cc3c([nH]c4ccccc34)C(c3ccc(F)cc3)N2C1=O
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?