COc1ccc(C(=O)c2ccc3oc(-c4ccc(OC)cc4)c(C#CCCO)c3c2)cc1
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?