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Mestrelab offers a standalone Molecule editor that is based on a Mnova-incorporated function. Try it here!

The editor is free to use, however certain functions, namely file import and export as well as the IUPAC name-to-structure conversion require a connection to a server. By default, the Mestrelab server is used but the editor can be licensed and, for a fee, we will set up the server side for you. This will allow you to remove the “Mestrelab Research SL” watermark too.

The editor is free to use, however certain functions, namely file import and export as well as the IUPAC name-to-structure conversion require a connection to a server. By default, the Mestrelab server is used but the editor can be licensed and, for a fee, we will set up the server side for you. This will allow you to remove the “Mestrelab Research SL” watermark too.

Features

Support for 300+ chemical labels common in organic chemistry and biochemistry

Please see the current label list.

Structures can be exported as .mol files

.mol files are the most popular chemical table format. Import and export as text doesn’t require a connection with the Mestrelab server, however uploading and saving files does.

Automatic conversion from IUPAC names to structures powered by OPSIN.

OPSIN is a library for converting chemical names, especially organic chemical names, into structures. This function also requires a connection with the server.

Download it and install it on your website

The download of the editor is free and so you can add it to your own website.

You can also license it for a fee so that you can do the server side operations.

Drawn structures are fully customizable.

Bond lengths and widths, colors and fonts can all be adjusted.

Precise control over the edited structure.

Separate menus for individual atoms and bonds and for the entire molecule allow a precise control over the edited structure.

All elements (plus H isotopes D and T) are supported.

The ones commonly used in organic chemistry carry information about valence, charge and atomic mass. That way the proper bonding can automatically be maintained.