Cc1cc2c3c(coc3c1-c1c(C)cc3c4c(coc14)C(=O)C(O)=C3C(C)C)C(=O)C(O)=C2C(C)C
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?