# Chiral atom count **URL:** \ **Category:** Partner Extensions\ **Tags:** schrodinger\ **Created:** [November 13, 2009, 5:10pm UTC](https://forum.knime.com/t/chiral-atom-count/581 "2009-11-13T17:10:58Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![haustedt](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/h/ce73a5/32.png) [@haustedt](https://forum.knime.com/u/haustedt)\ **Post date:** [November 13, 2009, 5:10pm UTC](https://forum.knime.com/t/chiral-atom-count/581/1 "2009-11-13T17:10:58Z")
Is there an easy way to count chiral atoms per molecule? ---
**Author:** ![Franksch](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/f/6de8d8/32.png) [@Franksch](https://forum.knime.com/u/Franksch)\ **Post date:** [January 20, 2010, 10:44am UTC](https://forum.knime.com/t/chiral-atom-count/581/2 "2010-01-20T10:44:47Z")
Hi Lars Here is an answer that we got from the Schrödinger Support team. "Thank you for your question. I was asked to inform you how to generate a property for the number of chiral centers for each structure in a file using Knime and the Schrodinger extensions. I will do so here. This example uses the “LigParse” node. You will need a filter file. It should be as follows. ## Filtering using LigParse Num chiral centers \>=0 ## End Use the lines above as the “Criteria file” in the Knime LigParse node configuration. After execute the node, the results will have a property “Num chiral centers”. " I hope this helps. Let me know if it worked. Frank ---
**Author:** ![system](https://forum-cdn.knime.com/uploads/default/original/1X/ab3ccf34482a0329361734a18199390177204f15.png) [@system](https://forum.knime.com/u/system)\ **Post date:** [April 21, 2023, 8:55pm UTC](https://forum.knime.com/t/chiral-atom-count/581/3 "2023-04-21T20:55:01Z")
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.