CCOC(=O)c1c(N2CCCC2)[nH]c(=O)c(C(c2cccs2)c2c(O)c(C(=O)OCC)c(N3CCCC3)[nH]c2=O)c1O
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?