Those are the building blocks of life.
One wonders what carbon dating will reveal. Carbon dating works because radioactive carbon is continuously renewed by solar radiation in the atmosphere. But radioactive carbon decays over time giving reduced levels in below ground sources.
How will that work on an asteroid? Zero gravity means atmospheric carbon dioxide is likely to dissipate if present. Can radiocarbon still be renewed? At faster rates? Or will levels be very low suggesting renewal does not happen on asteroids?