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  • An open database of free scholarly articles. Unpaywall harvests Open Access content from over 50,000 publishers and repositories, and make it easy to find, track, and use.

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  • searchRxiv enables researchers to: post their searches, ensuring credit for all those involved; obtain a digital object identifier (DOI) for their search, enabling it to be cited; link searches to published articles as relevant; find it easier to follow best practice for structuring their search strategy; and easily find relevant searches in their subject area by searching across search strings as well as metadata describing those search strings.

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  • SCRIPDB is a chemical structure database designed to make patent metadata accessible. We index public-domain chemical information contained in U.S. patents, and provide the full patent text, reactions, and relationships described within any individual patent, as well as the original CDX, MOL, and TIFF files.

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