CC(=O)N/C(=C\c1ccc(Cc2nc3c([nH]2)C(=O)c2ccccc2C3=O)cc1)c1nc2c([nH]1)C(=O)c1ccccc1C2=O
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?