CC(C)CC(N)C(=O)NC(CNC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CC(C)C)C(=O)O)Cc1ccc2ccccc2c1
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?