With the absence of oxygen, branched alkaline would be produced.Whereas when oxygen was available, some other structures like hemiacetal, ether bond were produced.

• 其中无氧条件下可能发生侧链烷烃交联而形成支链，在有氧分子参与的情况下，反应进一步进行形成一些架桥结合，诸如半缩醛、醚键等等。