Uses MDL’s CTfile formats (Molfile, RXNfile, and SDfile), ensuring compatibility with many modern chemical databases.
Access to extensive libraries of rings, functional groups, and reaction arrows. Download Isis Draw 2.5 Free
: The software is no longer distributed by its original developers. "Free" downloads available on third-party websites may be unauthorized copies, potentially violating copyright laws. Uses MDL’s CTfile formats (Molfile, RXNfile, and SDfile),
A very powerful alternative by ACD/Labs. It includes 3D viewing features that the old ISIS/Draw lacked. MarvinSketch: Uses MDL’s CTfile formats (Molfile