Give the 2 + 2 cycloaddition reaction of thymine. 
Definitions:
Adrenal Gland
Endocrine glands located above the kidneys that produce various hormones, including adrenaline and steroids affecting the body's metabolism and blood pressure.
Subjective Well-Being
An individual's self-assessment of happiness and life satisfaction, considered from a personal perspective.
Active Religious Faith
The practice of engaging actively in religious activities and beliefs, often involving rituals, worship, and community participation.
Physically Attractive
The possession of physical features that are aesthetically pleasing or beautiful to the majority of observers.
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