CCSc1ccc(-c2cc(NC=O)c3ncc(-c4cccc(C(=O)NCCN(C)C)c4)n3c2)cc1
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?