Cc1c(NC(=O)CN2c3cccc4cccc(c34)S2(=O)=O)c(=O)n(-c2ccccc2)n1C
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?