COc1ccc2[nH]c3c(c2c1)CCN1C(=O)N([C@@H](C)C(=O)NC2CCN(Cc4ccccc4)CC2)C(=O)[C@]31C
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?