To get a key, follow these steps on the ChemAxon official site :
If it's your first time, a prompt will usually appear asking for a "valid license." Click . marvinsketch license key
Without a valid key, the software may operate in a restricted "freeware" mode or expire after a trial period. How to Get a Legal License Key To get a key, follow these steps on
: Once approved, your key will be available in your account dashboard or sent via email. 3. Installation Steps To get a key
| Tool | Best For | License | | :--- | :--- | :--- | | | High-quality 2D graphics | Freemium (paid for commercial) | | Avogadro | 3D molecular modeling | Open Source (GPL) | | BKChem | Simple 2D drawing | Open Source (BSD) | | Open Babel GUI | File conversion and drawing | Open Source (GPL) |