COc1ccc(-n2c3c(cc(C(=O)N4CCN(CCO)CC4)c2=O)C(=O)CC(C)(C)C3)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?