COc1ccc(-c2ccc3c(c2)[C@@H]2C[C@H]4[C@@H](C(=O)N2CC3)[C@H](C)ON4C)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?