CC(C)CC(NC(=O)C(CC(C)C)NC(=O)C(Cc1ccc(OCc2ccccc2)cc1)NC(=O)OC(C)(C)C)C(N)=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?