Provide the necessary reagents for the following conversion. 
Definitions:
Flatus
Intestinal gas.
Gas
A state of matter characterized by neither a fixed shape nor a fixed volume and can expand freely to fill any space available.
Peptic
Pertaining to digestion; can also refer to an ulcer of the upper digestive tract.
Gastric Ulcer
A sore or lesion that develops on the lining of the stomach, often resulting from infection with H. pylori bacteria or prolonged use of NSAIDs.
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