CCCC1(CCC)c2cc(/C=N\O)ccc2-c2ccc(-c3ccc(C(C)(C)C)cc3)cc21
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?