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Free Databases for Search by Structure
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500,000+ Free Search 500,000 + Structures of Available Compounds and Submit Inquiry Online.  Browse databases, go to any page anytime, Very fast searches, 1-2 seconds to search through 500,000 structures: substructure search, exact structure search, similarity search, search by product ID, Molecular Weight and Formula; Export structures from search results to MOL or SDF files; Save selected compounds to your list (shopping cart); Submit the list of selected structures for ordering.
360,000+ Free ChemIDplus - A searchable database of 360,000+ chemical substance records
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