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### Chemical similarity search
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+This example uses the inverse frames feature, which is deprecated as of v0.9.0. This will soon be updated to reflect the current Pilosa API.
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#### Overview
The notion of chemical similarity (or molecular similarity) plays an important role in predicting the properties of chemical compounds, designing chemicals with a predefined set of properties, and—especially—conducting drug design studies. All of these are accomplished by screening large indexes containing structures of available or potentially available chemicals.