Pyosra is a Python wrapper that exposes the functionality of the OSRA structure recognition tool to a Python environment, using pybind11.
It adds the capability to extract R-Group structures.
Pyosra is designed to work in tandem with ChemSchematicResolver,a tool that can extract many chemical diagram and their descriptive labels directly from scientific articles, in an automated fashion.
ChemSchematicResolver is open-source and documentation can be found at www.chemschematicresolver.org . The source code can be found at https://github.com/edbeard/ChemSchematicResolver .
The documentation for OSRA can be found at https://cactus.nci.nih.gov/osra/ .