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<p>orbiting in the <a href="page.php?w=Saturn">Saturn</a> system, suggests that uracil is present on the surface of the moon <a href="page.php?w=Titan_%28moon%29">Titan</a>.  In 2023, uracil was observed in a sample from <a href="page.php?w=162173_Ryugu">162173 Ryugu</a>, a <a href="page.php?w=near-Earth_asteroid">near-Earth asteroid</a>, with no exposure to Earth's biosphere, giving further evidence for synthesis in space.</p>

<p><big>Reactions</big></p>
<p><a href="page.php?w=Image%3AUridin.svg">thumb</a>Uracil readily undergoes regular reactions including</p><p>
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