CCn1cc([N+](=O)[O-])c(C(=O)N2N=C(c3ccc(OC)cc3OC)CC2c2ccccc2O)n1
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?