COc1cccc(-c2ccc3c(c2)O[C@H](CN(C)C(=O)c2ccccc2F)[C@H](C)CN([C@H](C)CO)S3(=O)=O)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?