O=C(NC1CCN(Cc2ccccc2)CC1)c1ccc(Cn2c(=S)[nH]c3ccc(N4CCOCC4)cc3c2=O)cc1
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?