Pyrimidine , like polycyclic aromatic hydrocarbons ( PAHs ) , is one of the most carbon - rich compounds found in the Universe .
Pyrimidine , like polycyclic aromatic hydrocarbons ( PAHs ) , may have been formed in red giants or in interstellar dust and gas clouds .
Pyrimidine , like polycyclic aromatic hydrocarbons ( PAHs ) , is one of the most carbon - rich compounds found in the Universe and may have been formed in red giants or in interstellar dust and gas clouds .