CC1=C(C(=O)N(C(C)C)C(C)C)CC(CC(=O)NC(c2ccccc2)c2ccccc2)C(=O)N1CCC1=CCCCC1
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?