FRAGMENT REPLACEMENT & MOLECULAR DESIGN
BROOD
BROOD is designed to help explore chemical and property space around a hit or lead molecule. BROOD generates analogs of the lead by replacing selected fragments in the molecule with fragments that have similar shape and electrostatics, yet with selectively modified molecular properties.
BROOD fragment searching has multiple applications, including lead-hopping, side-chain enumeration, patent breaking, fragment merging, property manipulation, and patent protection by SAR expansion.
Using OpenEye’s BROOD software for scaffold hopping, we successfully discovered a new chemical series from our lead compound, with equipotency and improved stability. – Laurent D., Lundbeck
Comparison of an ester fragment and an oxazole fragment showing the electrostatic isopotential contour surfaces. The electrostatic Tanimoto between the two fragments is 0.54.
Features
- Graphical query editing including the ability to easily modify the similarity force-field as well as add and remove chemical constraints such as those known to be critical to the SAR under development
- Graphical interface to facilitate physical property analysis and real-time property filtering of millions of potential molecules
- Integrated estimation of synthetic accessibility
- Construction and assessment of new molecule series in a protein active-site
- Hierarchical organization of the hitlist of analog molecules along with a new graphical interface designed specifically to explore and edit the hitlists
- Database of more than 4 million medicinally relevant fragments provided and utilities to aid users in augmenting this database with novel fragments from their corporate collections
- Tools for modelers and chemists to communicate their ideas and preferences including favorite molecules list management, molecular annotation, view bookmarking and hitlist subsetting
ROCS X: AI-Enabled Molecular Search Unlocks Trillions
Webinar: Modular Molecular Modeling
Webinar: OpenEye's Free energy prediction for drug discovery: Ideas at breakfast, discoveries by lunch
CUP XXV - Santa Fe March 10-12, 2026
Webinar: Novel Hits from Beyond the Known: ROCS X
Webinar: Modular Molecular Modeling
Webinar: OpenEye's Free energy prediction for drug discovery: Ideas at breakfast, discoveries by lunch
CUP XXV - Santa Fe March 10-12, 2026
Webinar: Novel Hits from Beyond the Known: ROCS X
Resources
Glimpse the Future through News, Events, Webinars and more
News
ROCS X: AI-Enabled Molecular Search Unlocks Trillions
BOSTON, OpenEye miniCUP—Sept. 25, 2025—Cadence Molecular Sciences (OpenEye), a business unit of Cadence (Nasdaq: CDNS), announced today at miniCUP Boston, the launch of ROCS X, an AI-enabled virtual screening solution that allows scientists to conduct 3D searches of trillions of drug-like molecules.
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Upcoming Webinar
Webinar: Modular Molecular Modeling
Webinar: Modular Molecular Modeling Join our February miniWebinar led by Paul Hawkins, Product Evangelist. About this session: This webinar will provide an overview of our software libraries or toolkits, with an emphasis on how they can be used to efficiently develop customized, integrated solutions to complex problems in modern drug discovery. We will highlight several examples of the impact our toolkits have in solving a wide variety of problems for our users, including work from PubChem, Pfizer, and AstraZeneca. We will also illustrate the central place that they play in developing our own solutions.
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