CCN(CCO)c1nc2c(sc3nc(C)c4c(c32)CC(C)(C)OC4)c(=O)n1-c1cccc(Cl)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?