COc1ccc(C2C=C(c3ccc(C)cc3)N(c3ccc(OC)cc3[N+](=O)[O-])C3C(=O)OC(=O)C23)c(OC)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?