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. 2020 Nov 4;25(21):5133. doi: 10.3390/molecules25215133

Scheme 45.

Scheme 45

Synthesis of oroidin (245a) from (E)-4-(3-aminoprop-1-en-1-yl)imidazole)-2-amine (246) and 4,5-dibromo-1H-pyrrole-2-carboxylic acid (247a).