Why does the diene shown below fail to undergo a Diels-Alder reaction with even the most reactive dienophiles? 
Definitions:
Good Faith
An honest intention to act without taking an unfair advantage over another party, often applied in negotiations and agreements.
Collective Bargaining
The process of negotiation between employers and a group of employees aimed at agreements to regulate working salaries, working conditions, benefits, and other aspects of workers' compensation and rights.
Counterproposal
A response to a proposal with an alternative offer or terms.
Prima Facie
A term meaning "on its face" or "at first glance," used to describe evidence that is sufficient to prove a fact unless contradicted by further evidence.
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