CCOC(=O)C1CCCN(c2c(C(=O)c3ccc(C)cc3)cnc3ccc(OCC)cc23)C1
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?