A class of organic chemical compounds containing a benzene ring fused with an oxygen-containing ring, used in dyes and pharmaceuticals.
From Greek 'chroma' (color) plus the chemical suffix '-ene' (indicating a carbon-carbon double bond), named for compounds originally identified for their coloring properties.
Chromenes are the chemical building blocks for some of nature's most brilliant colors—researchers are now engineering chromene-based compounds that change color in response to light, creating 'smart' fabrics that could change color on demand.
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