Usage History of 'benzofurans'

The following chart shows how frequently 'benzofurans' appeared in printed materials over time. For example, the word 'benzofurans' occurred 6 times in books in 1949 and 68 times in 2008. From 1949 to 2008, the word 'benzofurans' was used a total of 2,067 times in books scanned by Google. See Reference: Google Ngram project.

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