Apart from the LOCATION@1 experiment , described above , the next most important step in research on prebiotic organic synthesis was the demonstration by PERSON@1 that the nucleic acid purine base , adenine , was formed by heating aqueous ammonium cyanide solutions .

The next most important step in research on prebiotic organic synthesis was the demonstration by PERSON@1 that the nucleic acid purine base , adenine , was formed by the simple heating of solutions of ammonium cyanide .
