CC(C)C(NC(=O)OCC1c2ccccc2-c2ccccc21)C(=O)NC(CCC(=O)OC(C)(C)C)C(=O)OC(C)(C)C
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?