CCCC1(C(=O)O)NC(c2ccccc2O)C2C(=O)N(c3cccc(Cl)c3)C(=O)C21
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?