Release_2025.09.1b1 (Changes relative to Release_2025.03.1) Acknowledgements (Note: I'm no longer attempting to manually curate names. If you would like to see your contribution acknowledged with your name, please set your name in GitHub) Jakub Adamczyk, Chris Von Bargen, Jason Biggs, Anna Brünisholz, Kevin Boyd, Filip Chmielewski, Michael Cho, Brian Cole, David Cosgrove, Nia Dickson, Maria Dolotova, Genevieve Evans, Hussein Faara, Noah Herrington, Tad Hurst, Eisuke Kawashima, Kevin Keating, Brian Kelley, Jakub Klinkovský, Patrick Kunzmann, Niels Maeder, Mark Mackey, Jeremy Monat, Dan Nealschneider, Axel Pahl, Yakov Pechersky, Shashir Reddy, Vandan Revanur, Ricardo Rodriguez, Paul Thiessen, Caleb Thomas, Paolo Tosco, Inwan Yoo, badisa, dehaenw, dpdoughe, getuem, InvincibleZZH, jdavies-nurix, Kacper-Kozubowski, paconius, rwalroth, Saul, Stephen, yuri@FreeBSD Highlights Backwards incompatible changes: atom maps on dummy atoms are now always used in the calculation of canonical atom ranks. 2D coordinate generation may produce different results for some molecules due to a change in the way the atom ordering is computed in the depiction code. Default ET-version in ForceFields::CrystalFF::getExperimentalTorsions() is changed from 1 to 2. New Features and Enhancements: switch to C++20 (github pull #8039 from greglandrum) Add SCSR parsing to RDKit (github pull #8147 from tadhurst-cdd) support clearPropertyCache() on ROMol and Atom (github issue #8241 from greglandrum) Speed up GetProp Python keyerrors (github pull #8372 from d-b-w) Expose reading/writing PNG metadata to CFFI and MinimalLib (github pull #8381 from ptosco) add property to indicate when a CIP calculation has been done (github issue #8396 from greglandrum) Bump MaeParser version to 1.3.2 (github pull #8404 from ptosco) Moving towards getting all tests to pass when using the new stereo code (github pull #8409 from greglandrum) Enable the chiral flag on enumerated isomers (github pull #8410 from ricrogz) Change default ETversion. (github pull #8414 from DavidACosgrove) Support pickling Shape inputs (github pull #8434 from DavidACosgrove) add function to overwrite setattr to only accept valid arguments (github pull #8448 from nmaeder) ShapeInput from subset of atoms in molecule (github pull #8449 from DavidACosgrove) add StereoGroup.getBonds() to Python wrapper (github pull #8451 from greglandrum) add quick H-H bond removal to connectTheDots (github pull #8452 from greglandrum) Protect Python DrawOptions from bad attributes. (github pull #8453 from DavidACosgrove) Add a custom CXSMILES feature to indicate Zero Order Bonds (github pull #8454 from ricrogz) Add the safeSetattr to the rdMolFiles param objects (github pull #8457 from nmaeder) Method to remove enhanced stereo from an atom (github issue #8467 from jdavies-nurix) Add Synthon space hit filters (github pull #8473 from DavidACosgrove) Set default Eigen3 version to 3.4.0 (github pull #8477 from pechersky) A couple optimizations to when the ring finding code is called (github pull #8482 from greglandrum) Allow single/double bonds to match aromatic in substructure search (github issue #8485 from PaulThiessen) improve operator for a couple of headers for windows compilation (github pull #8763 from cdvonbargen) Code removed in this release: Deprecated code (to be removed in a future release): The functions FileParserUtils::applyMolListPropToAtoms(), FileParserUtils::applyMolListPropsToAtoms(), and FileParserUtils::getAtomPropertyList() have been deprecated, please use FileParserUtils::applyMolListProp(), FileParserUtils::applyMolListProps(), and FileParserUtils::getPropertyList() instead.