Which of the following is the structure of purine? 
Definitions:
Switch Technologies
Changing or transitioning from one technology to another, often to improve efficiency, performance, or to embrace newer standards.
Platform Strategy
A business approach that focuses on creating a foundational service or technology that supports various products, services, or participants.
Complementary Innovation
Innovations that enhance the value or functionality of existing products or services when used together.
Substitute Innovation
New products or services that replace existing ones by fulfilling the same needs or wants in a different or superior way.
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