The carbon‐13 NMR spectrum of dimethoxybilirubin dimethyl ester

Abstract
The 13C NMR spectrum of dimethoxybilirubin dimethyl ester (1) is reported. Methoxyvinylneoxanthobilirubinic acid methyl ester, a compound containing one endo‐vinylpyrromethene unit, was prepared and used in the assignment of the spectrum of 1.

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