O=C1c2c(c3c4ccccc4n(CC4CO4)c3c3[nH]c4ccccc4c23)C(=O)N1Cc1ccccc1
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?