OCCN1CCN(c2ncnc3c2ncn3[C@H]2CN(Cc3ccc(-c4ccccc4)cc3)C[C@@H](CO)O2)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?