Compound X can be synthesized via a ring-closing metathesis reaction when treated with a Grubbs' catalyst.What is a possible structure of the starting material for this reaction? 
Definitions:
Nociceptor
A sensory receptor that responds to damaging or potentially damaging stimuli by sending signals to the spinal cord and brain.
Thermoreceptor
A type of sensory receptor specialized to detect changes in temperature.
Meissner's Corpuscles
Specialized nerve endings in the skin that are sensitive to light touch and texture.
Hypodermis
The deepest layer of the skin, composed of fat and connective tissue, providing insulation and cushioning for the body.
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