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Molpher & molpher-lib

Chemical space is a set of all possible chemically stable organic compounds. Its size is enormous, e.g. a number of structures with the molecular weight lower than 500 Da is estimated to be 1060. However, the majority of these compounds was not suggested, not to say synthesized and chacterized. Therefore, we have developed the method of molecular morphing [Hoksza D. et al. Journal of Cheminformatics 6 : 7 2014. DOI: 10.1186/1758-2946-6-7]  that systematically generates chemical subspaces between two selected structures. This method is implemented in a freely available program Molpher and programatically accessible using the Python library molpher-lib.


For the classification of compounds as easy and hard to syntesize it is necessary to have  examples from both classes. While it is straightforward to obtain easy to synthesize structures from chemical vendors catalogues, hard to synthesize structures are not avilable in any database. Thus, for the design of hard to synthesize compounds, we have developed a Nonpher methodology [Voršilák M. et al. Journal of Cheminformatics 9:20 2017. DOI: 10.1186/s13321-017-0206-2], that is based on our molecular morphing approach.


Cluster heatmaps are used for the analysis and visualization of hierarchical clusters in large data sets including, for example, bioactivity data. Our freely available Javascript library InCHlib (Interactive Cluster Heatmap Library) [Škuta C. et al. Journal of Cheminformatics 6 : 44 2014. DOI: 10.1186/s13321-014-0044-4] enables users to enhance their web portals by a flexible interactive visualization of cluster heatmaps.


MolMiner is a freely available Python application for the extraction of chemical compound formulas and names from scientific publications. It can be used not only from a command line, but also as a Python library. MolMiner's input is a PDF or image file with the document, the output is a set of chemical structures (in SMILES/InChI/SDF formats) names or 2D formulas of which were identified in the text .

Probes & Drugs portal

Chemical probes are small organic molecules commonly used to study gene function, validate molecular targets or dissect complex processes within cells and organisms. Compared to drugs,  a probe’s main attributes reside in its potency, selectivity and well-defined mechanism of action. Yet identifying suitable chemical probes is not a trivial task because information on candidate probes is typically scattered over various sources. Thus, our colleagues from the Laboratory of Cell Differentiation IMG AS CR have developed, with our small contribution, the Probes & Drugs (P&D) portal [Škuta C. et al., Nature Methods 14 (8) 758-759 2017. DOI: 10.1038/nmeth.4365], which set of almost 30,000 probes & drugs is assembled from 29 established public and commercial libraries. The P&D portal is update monthly and it enables users to identify high-quality chemical tools for the use in chemical biology and drug discovery research.

Updated: 30.10.2019 18:13, Author: Daniel Svozil

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