CCN(CC)CCCn1c2c(c(SCC(=O)Nc3cc(OC)cc(OC)c3)nc1=O)CCC2
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?