On the diagram below, identify the covalent bonds that break when hydrolytic attack results in depurination. 
Definitions:
Paxton Boys
A group of frontier settlers in colonial Pennsylvania who formed a vigilante movement in 1763, targeting and killing Native Americans in what they perceived as a form of self-defense.
Western Pennsylvania
A region in the United States characterized by its rich history, diverse landscape, and significant role in early industrial development.
Royal Colonial Government
The governing authority in a colony directed by the monarch of the parent country, implementing policies and administration through colonial officials.
Bourbon Reforms
A series of political and economic measures implemented by the Spanish Crown in the 18th century to revitalize the economies of Spanish colonies and increase their revenue.
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