COc1cccc(CNC(=O)Cn2cc3c(n2)-c2c(oc(C(=O)N4CCCC4)c2C)CC3)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?