Adenine, cytosine, guanine, and either thymine (DNA) or uracil (RNA). These are all organic compounds, and they are found in all known living things, plus viruses (which are not generally considered to be alive).

parts of the DNA are organic, but they arent even compounds.Carbohydrates, lipids, proteins, and nucleic acids. All of these are elemental compounds found in all living things. Obviously these elements contained in all living things are orgainic. <---- well this answer is correct depending on your view of a virus, a virus doesn't lipids and proteins I believe, so if you consider a virus a living organism this would not be true, though it would be hard to classify a virus as living as it only really does one thing that all living things do, reproduce.