COCc1ccc(-c2ccc3c(c2)c(C#Cc2ccsc2)c(-c2cc(OC)cc(OC)c2)n3C)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?