COc1cccc(/C=N/NC(=O)c2[nH]c(C)c(C(=O)N/N=C/c3cccc(OC)c3)c2C)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?