O=C(NCc1ccccc1)c1ccc2c(=O)[nH]c3c(C(=O)NCC4CCCO4)sc(=S)n3c2c1
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?