CCN(CC)C(=O)N[C@@H]1C=C2c3cccc4[nH]cc(c34)C[C@@H]2N(C)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?