COc1cc(OC)c(NC(=O)N2CCc3cc(S(=O)(=O)N4CCC(C)CC4)ccc32)cc1Cl
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?