Cc1ccc2c(c1)N(S(=O)(=O)c1ccc(CN3C(=O)c4cccnc4C3=O)s1)CCO2
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?