Examlex
Suggest an explanation for why aspirin has a sour taste.
Nonaromatic
Organic compounds that do not fulfill the criteria for aromaticity, lacking the special stability observed in aromatic systems.
Fused-ring Heterocycle
A cyclic compound where two or more rings share two or more common atoms, with at least one of the rings containing atoms other than carbon.
Purine
A heterocyclic aromatic organic compound, forming the basis of two of the four nucleotides that constitute DNA and RNA (adenine and guanine).
Pyrimidine
A heterocyclic aromatic organic compound, similar to benzene and pyridine, containing nitrogen atoms at positions 1 and 3 in the ring.
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