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Imidazole Furan Aromaticity Lone pair Heterocyclic compound, drawing software transparent background PNG clipart
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Pyrrole Simple aromatic ring Aromaticity Heterocyclic compound Arsole, structural formula transparent background PNG clipart
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Pyrazole Proton nuclear magnetic resonance Ethyl acetoacetate Heterocyclic compound Imidazole, Pyrimidine Metabolism transparent background PNG clipart
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