CCNC(=O)c1c(NC(=O)c2cc(-c3cc(C)cc(C)c3O)[nH]n2)sc2c1CCCC2
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?