COc1cc(OC)cc(-c2c(C#Cc3ccsc3)c3cc(-c4ccc5c(c4)OCCO5)ccc3n2C)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?