CCOc1cccc2cc(-c3csc(NC(=O)CCC(=O)NCCN4CCCCC4C)n3)c(=O)oc12
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?