O=C(Oc1ccc(-c2ccccc2)cc1)c1cccc2c1NC(C(=O)O)C1CC=CC21
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?