COc1cc2c3c(c1)C1(C(=O)N3C(C)(C)C=C2C)C(C#N)=C(N)Oc2cc(O)ccc21
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?