Abstract
The thermodynamic potential for the abiotic synthesis of the five common
nucleobases (adenine, cytosine, guanine, thymine, and uracil) and two monosaccharides
(ribose and deoxyribose) from formaldehyde and hydrogen cyanide has been quantified
under temperature, pressure, and bulk composition conditions that are representative of
hydrothermal systems. The activities of the precursor molecules (formaldehyde and
hydrogen cyanide)
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