CCc1ccc(NC(=O)C2CCN(c3cc(C)nc4c(-c5ccc(Cl)cc5)c(C)nn34)CC2)cc1
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?