CC(=O)NC1=NN(C(C)=O)C2(S1)C(=O)N(C(C)C)c1ccc(C)cc12
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?