CC(=O)Nc1ccc2c3c(cc(O)c2c1)N(C(=O)CCCC(=O)Nc1ccc2c4c(cc(O)c2c1)N(C(=O)OC(C)(C)C)CC4CCl)CC3CCl
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?