COCCN1CC(=O)N2C(c3cccc(OC)c3)c3[nH]c4ccccc4c3C[C@H]2C1=O
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?