COc1ccc(-n2c(SCC(=O)Nc3ccc(NC(C)=O)cc3)nc3c4ccccc4nc-3c2O)cc1OC
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?