CCCCS(=O)(=O)N1CCc2nc(-c3ccccc3)c3c(c2C1)CO[C@@H](C)C3
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?