CCOC(=O)C1=NN(C(C)=O)C2(CC(=O)N(c3cc(C)cc(C)c3)C2=O)C1
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?