CCOC(=O)C1=CC[C@H]2c3c(c4ccccc4n3C)C(=O)C1N2C(=O)OC(C)(C)C
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?