* Urea: A common waste product in mammals, with the formula (NH₂)₂CO.
* Amino acids: The building blocks of proteins. While not all amino acids contain oxygen, many do, such as glycine (C₂H₅NO₂) and alanine (C₃H₇NO₂).
* Creatine: A molecule involved in muscle energy production, with the formula C₄H₉N₃O₂.
* Caffeine: A stimulant found in coffee, tea, and chocolate, with the formula C₈H₁₀N₄O₂.
* Nitroglycerin: A powerful explosive and vasodilator, with the formula C₃H₅N₃O₉.
To give you a more specific answer, please provide more context. For example:
* What is the purpose of this molecule? (e.g., a biological molecule, a chemical compound, etc.)
* What is its approximate size? (e.g., small, medium, large)
* What are its properties? (e.g., soluble in water, volatile, etc.)
With more information, I can help you narrow down the possibilities.
