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Restore Structure from Server to Ketcher
How to restore a chemical structure from the Web server to the Ketcher editor? If you want to build a chemical structure editor with the capability to save the structure on the Web server and restore it later to the Ketcher, you should follow steps described below: 1. Using JavaScript to export the ...
2023-10-11, 344🔥, 0💬

Ketcher JavaScript API
Where to find FAQ (Frequently Asked Questions) on Ketcher JavaScript API? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Ketcher JavaScript API. What Is Ketcher JavaScript API contentWindow.ketcher - Access "ketcher" Object ketcher.setMolecule...
2023-10-05, 786🔥, 0💬

Build Ketcher Editor Web Page
How to build my own Ketcher editor Web Page? If you want to build your Web page and offer Ketcher as a Chemical Structure Editor in the middle of the page, you can follow this tutorial. 1. Follow the previous tutorial to install Ketcher on your Web server. 2. Create a new HTML document, editor.html,...
2023-10-05, 509🔥, 0💬

Wedge/Hash Bond Changed by Open Babel
Why some Wedge/Hash Bonds are Changed by Open Babel? Sometimes, you may have an Wedge/Hash bond in the input data to specify a stereo center. When you convert the input data with Open Babel, you will see that the stereo center is identified with a different Wedge/Hash bond. For example, the followin...
2023-08-17, 832🔥, 0💬

Write Stereoinformation to Output
How stereoinformation is being written to output data by Open Babel? Stereoinformation is being written to output data based on stereo centers maintained by Open Babel according the following rules: 1. 3D Stereoinformation - By default, 3D coordinates are copied over from input data to output data w...
2023-08-17, 765🔥, 0💬

JSME Molecule Online Editor
How to create and edit a molecule structure with JSME molecule editor? To help you to create and edit a molecule structure, FYIcenter.com provides this JSME Molecule Online Editor tool. All you need to do is to click a menu icon and draw a molecule by adding one part at a time. When you are done, yo...
2023-07-21, 6067🔥, 1💬

SMILES to 2D or 3D SDF/Mol Converter
How to convert SMILES to SDF/Mol file and view the molecule 2D or 3D structure? To help you converting SMILES to SDF/Mol file and view the 2D or 3D molecule structure, FYIcenter.com provides this SMILES to SDF/Mol Online Converter tool. All you need to do is to: Enter a SMILES string and click the "...
2023-07-11, 94420🔥, 5💬

💬 2023-07-11 FYIcenter.com: Glad to know our site is valuable to you!

💬 2023-07-10 Prof Ahmed S Ali: very valuable site

💬 2023-04-07 Dr. jariya: NICE

(More comments ...)

Refresh Molecule in JSME Editor
How to refresh (read and reset) molecule created in JSME editor with the Web server? If you want refresh molecule properties displayed in the JSME editor, you can use a PHP script on the Web server to read and reset the molecule structure in the JSME editor. 1. Create an HTML form with an input fiel...
2023-04-13, 305🔥, 0💬

Failed to Load D4DF9EC9DD21B943E35F3D5696D5D2A1.cache.js
Why JSME editor is not showing after upgrade to the 2022-09-26 version? If you upgraded JSME to the 2022-09-26 version from an older version, the JSME editor may fail to show up in your browser. In the browser developer console, you will see that a required JSME JavaScript file, D4DF9EC9DD21B943E35F...
2023-04-13, 302🔥, 0💬

openbabel.cheminfo.org/v1/convert - Web API
How to make a HTTP request to the Open Babel Web API at openbabel.cheminfo.org/v1/conv ert?You can call the Open Babel Web API at https://openbabel.cheminfo.org /v1/convertwith a HTTP POST request as shown below. 1. Use "curl" command to call the Web API to generate a 3D SDF file from a given SMILES...
2023-01-24, 481🔥, 0💬

Open Babel Web Interface at cheminfo.org
Is there any Web interface available for Open Babel? I want to try it before installing it on my local computer. You can try Open Babel on the Web interface provided by cheminfo.org. 1. Go to http://www.cheminfo.org/Chemis try/Cheminformatics/FormatConv erter/index.html. You see the Web interface tha...
2023-01-24, 432🔥, 0💬

"DNF/YUM install" - Open Babel Binary Packages
How to install Open Babel binary packages with DNF/YUM commands on CentOS systems? If you are running CentOS 8, you can follow this tutorial to install Open Babel binary packages: 1. Install "openbabel" package: fyicenter$ sudo sdf install openbabel Installed: openbabel-3.1.1-14.el8.x86_64 openbabel...
2023-01-24, 338🔥, 0💬

"-o svg -xd -d" Bug in Open Babel 3.1.1
Why "obabel ... -o svg -xd -d" is not able to remove hydrogens? It seems to be code bug in the "obabel" command in Open Babel 3.1.1 release. In Open Babel 3.1.1 release, options -xd and -d are not respected together for SVG output in the "obabel -i sdf -o svg -xC -xt -xP400 -xd -d" command. For exam...
2023-01-24, 285🔥, 0💬

JSME Tutorials
Where to find FAQ (Frequently Asked Questions) on JSME, Molecule Editor in JavaScript? I want to learn more about JSME. Here is a large collection of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on JSME, Molecule Editor in JavaScript: Introduction to JSME What I...
2023-01-18, 3702🔥, 0💬

Examples Provided in JSME
Where to find more examples on using JSME? The JSME distribution package provides a number example on how to use JSME. If you open "./JSME_2022-09-26/index.html" in a Web browser, you see the following examples: JSME_minimal.html - minimalistic example how to incorporate JSME into a web page JSME_te...
2023-01-18, 352🔥, 0💬

JSApplet.Inchi.computeInchi() - Generate InChI
How to generate InChI and InChIKey with the JSApplet.Inchi.computeInchi() method? The latest version of JSME allows you to generate InChI and InChIKey from a given molecule in SDF format. Here are the steps you can follow to do this in JavaScript code: 1. Create an empty object called "JSApplet" and...
2023-01-18, 350🔥, 0💬

Install JSME 2017-02-26 Version
How to download and install JSME? If you want to try JSME on your own computer, you can follow this tutorial to download and install it. 1. Go to JSME Website at https://www.peter-ertl.com/jsm e/. 2. Click "Download the JSME 2017-02-26" to start downloading. 3. Save the download file as "JSME_2017-0...
2023-01-18, 338🔥, 0💬

What Is Tanimoto coefficient
What Is Tanimoto coefficient? Tanimoto coefficient is a metric (or score) to measure the similarity of two sets of elements. Tanimoto coefficient can be simply defined as the ratio of the intersection of the two sets over the union of the two sets. More precisely, the Tanimoto coefficient of set A a...
2022-12-15, 23720🔥, 2💬

💬 2022-12-15 Nio: Thank you for your detailed and clear explanation. It is very helpful and understandable.

💬 2022-10-01 Simpson: Interesting...

Read Stereoinformation from Input
How stereoinformation is being read from input data by Open Babel? Most molecule data files store stereoinformation in 3 ways: 0D, 2D, and 3D. 0D: Stereoinformation in 0 dimension is defined by parity (or chirality) at atom level. 2D: Stereoinformation in 2 dimension is defined by bond style as wedg...
2022-11-16, 764🔥, 0💬

Stereo Perception Performed by Open Babel
What is stereo perception performed by Open Babel? Stereo perception performed by Open Babel is the process of constructing stereo centers with stereoinformation received from input data. Stereo perception is performed in the following order of precedence: 1. Constructing stereo centers with 3D ster...
2022-11-16, 764🔥, 0💬

What Is Stereochemistry
What Is Stereochemistry? Stereochemistry is the study of stereoisomers, which are molecules having same atoms and same connectivities, but with different spatial arrangements. Here are some stereoisomers listed in the picture below: Example of Stereoisomers You can do stereochemistry with Open Babel...
2022-11-09, 992🔥, 0💬

"obminimize" - Optimize Geometry/Energy of Molecule
What Is "obminimize" command? How to use it to optimize the geometry and minimize the energy for a given molecule? "obminimize" command is a command line tool provided in the Open Babel package that allows you to optimize the geometry and minimize the energy for a given molecule. Here is the user ma...
2022-08-27, 6520🔥, 2💬

💬 2022-08-20 FYIcenter.com: @Nathjanan, Yes. Your command is correct.

💬 2022-08-17 Nathjanan: Hello, How can I optimize small molecues? obminimize -ff MMFF94 -n 1000 *.mol2 Is this command correct? Thanks

Hash Bond with Solid Line
Why Hash Bond with a Solid Line used by Open Babel? Sometimes, when a hash bond is located on a ring structure, Open Babel adds a solid line to the hash bond. Here is an example SDF/Mol file, Hash-with-Solid-Line.sdf, that has 4 stereo centers on a ring structure. Hash-with-Solid-Line FYICenter.com ...
2022-07-26, 773🔥, 0💬

Structure Display Command on Open Babel GUI
How to change the display command on Open Babel GUI? By default, Open Babel GUI uses Firefox to display molecule structure. If you don't have Firefox installed, you will get an error: Obgui Error: Execution of command "firefox ..." failed. System cannot find the file. To fix the problem, you can cha...
2022-05-31, 1066🔥, 0💬

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