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Formulas which begin with C₁₉H₂₆N₂O₄

All formulas are in Hill order.

• C₁₉H₂₆N₂O₄ (5,5'-Methylenebis-(2,4-dimethyl-1H-pyrrole-3-carboxylic acid) diethyl ester)
• C₁₉H₂₆N₂O₄ (4,4'-Methylenebis-(3,5-dimethyl-1H-pyrrole-2-carboxylic acid) diethyl ester)

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