COc1cc2c(c(OC)c1OC)-c1ccc(OC)c(=O)cc1C(NC(=O)c1ccc(N=[N+]=[N-])cc1)CC2
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?