CCCCN(C=O)c1c(CC)nc2ccc(C(=O)N3CCN(S(=O)(=O)CC)CC3)cn12
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?