CC(=O)O.Cc1c(CNc2ccc(Cl)c(Cl)c2Cl)cnc2nc(N)nc(N)c12
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?