CC(C)=CCOc1ccc(-c2coc3cc4c(c(O)c3c2=O)C=CC(C)(C)O4)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?