Which of the following structures is the dienophile used to make the molecule shown here? 
Definitions:
Implicit Self-esteem
A form of self-esteem that is revealed by subconscious or automatic responses rather than conscious reflection.
Social Stigma
The disapproval of, or discrimination against, individuals or groups based on perceivable social characteristics that serve to distinguish them from other members of a society.
Authenticity
The quality of being genuine, real, or true, often in relation to one's self-expression and alignment with personal values.
Imposterism
A psychological pattern in which an individual doubts their accomplishments and fears being exposed as a "fraud."
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