COc1ccc(-c2c3c(=O)n(C)c(=O)n(C)c3c3n2-c2ccccc2NC3c2ccc(O)cc2O)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?