COc1cc2c3c(c1OC)-c1cc4c(cc1CC3(C#N)N(C(=O)c1ccccc1)CC2)OCO4
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?