The structure below is an intermediate along the way to the production of synthetic morphine.It is produced through a Diels-Alder cycloaddition reaction.Which combination of diene and dieneophile will result in its preparation? 
Definitions:
Oil Flow
Refers to the movement or circulation of oil through a system, important for lubrication, cooling, and hydraulic purposes.
Air Flow
The movement of air from one area to another, often critical in processes for cooling, ventilation, and combustion.
Water Flow
The movement of water through a particular path, often controlled or measured in systems related to plumbing, irrigation, and hydrology.
Properly Calibrated Instrument
An instrument that has been adjusted or configured correctly to ensure it meets the required accuracy and performance standards.
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