O=C(O)c1c2c(nc3ccc(S(=O)(=O)N4CCC(C(=O)NC5CCCC5)CC4)cc13)CCCCC2
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?