Library for processing molecules and reactions in python way.

Features:

• Read/write/convert formats: MDL .RDF (.RXN) and .SDF (.MOL), .MRV, SMILES, INCHI (inchi-trust library), .XYZ, .PDB
• Standardize molecules and reactions and valid structures checker
• Supported python-magic
• Tetrahedron, Allene and CIS-TRANS stereo supported
• Perform subgraph search
• Build/edit molecules and reactions with Python API
• Produce template based reactions and molecules
• Atom-to-atom mapping, checking and rule-based fixing
• Perform MCS search
• 2d coordinates generation (based on SmilesDrawer)
• 2d/3d depiction with Jupyter support
• SMARTS parser with restrictions
• Protective groups remover
• Common reaction templates collection

Full documentation can be found here.

Chython is fork of CGRtools.

Only python 3.10+.

pip install chython[racer-default]

• 2014-2026 Ramil Nugmanov nougmanoff@protonmail.com main developer

CGRtools contributors are included too.

• Adelia Fatykhova adelik21979@gmail.com
• Aleksandr Sizov murkyrussian@gmail.com
• Dinar Batyrshin batyrshin-dinar@mail.ru
• Dmitrij Zanadvornykh zandmitrij@gmail.com
• Ravil Mukhametgaleev sonic-mc@mail.ru
• Tagir Akhmetshin tagirshin@gmail.com
• Timur Gimadiev timur.gimadiev@gmail.com
• Zarina Ibragimova