O=C1CCC[C@@H]2Cc3[nH]c4c(Cl)ccc(Cl)c4c3[C@@H]3CCN1[C@@H]32
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?