The Perl Toolchain Summit needs more sponsors. If your company depends on Perl, please support this very important event.

Changes for version 0.21

  • Fixed incompatibility with Statistics::Regression v0.52.
  • Switched to Dist::Zilla.
  • Adjusted URLs in documentation, as the source has been hosted on GitHub.
  • New co-maintainer Andrius Merkys <>.


Represent a ring as a substructure of a molecule
Find the rings (cycles) in a molecule