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. Author manuscript; available in PMC: 2020 Jul 1.
Published in final edited form as: Chembiochem. 2019 May 3;20(13):1659–1663. doi: 10.1002/cbic.201800817

Figure 1.

Figure 1.

Azo dyes derived from 5-hydroxyindole are highly chromophoric. A) Structures of the azo compounds synthesized, and B) their normalized absorption spectrum, as well as molar extinction coefficient at 480 nm.