2-Nitroaryldifurylmethanes 1a and 1b. readily available by condensation of 2-nitrobenzaldehyde and 6-nitroveratraldehyde with 2-methylfuran. were transformed into indole. cinnoline and benzothiazine-3. https://www.marcelovicente.com/product-category/beard-brush/
Beard Brush
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