O=C(COC(=O)[C@H](Cc1ccccc1)NS(=O)(=O)c1ccccc1F)NC1CCCCC1
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?