Which of the following are enol forms of 2-butanone, 
Definitions:
Autoimmune Response
Occurs when the body's immune system mistakenly attacks its own cells, tissues, or organs, leading to various autoimmune diseases.
Autoimmune Theory
The theory that certain diseases are caused by the immune system mistakenly attacking the body's own cells, tissues, or organs.
Aging Brain Cells
The natural process of brain cell (neuron) degeneration over time, which can impact cognitive functions such as memory, attention, and learning capacity.
Alzheimer's Disease
A progressive neurodegenerative disorder characterized by cognitive decline, memory loss, and changes in behavior, leading to a decline in daily functioning.
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