VAST™ Chemical Space

Virtual, Automated, Swift, and Tailored for drug discovery

Explore VAST, an enumerated virtual chemical space crafted from in-stock building blocks and validated reactions. They are synthetically accessible ensured by XtalPi’s AI models built upon extensive proprietary data. Our automated synthesis platform provides ultra-fast delivery within 2–4 weeks to accelerate your projects. Tailored library design and follow-up synthesis are also available for your specific needs.

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Our Advantages

Ultra-Fast Delivery

  • Typical lead time: 2–4 weeks
  • Fully automated synthesis
  • Streamlined workflow, utilizing agentic AI
  • In stock starting materials

High Success Rate

  • Over 85% success rate
  • Feasibility models trained on 330K proprietary reactions
  • 1–2 synthetic steps
  • 40+ validated reaction protocols

Easy to Follow-up

  • Analogue search in extended space
  • Focused library design and synthesis
  • 29 automation-enabled chemistries

Tailored for Drug Discovery

  • Drug-like properties ensured
  • Filtered for structural alerts
  • Various subsets available upon request (e.g., molecular glue library)

Download 4.6 Billion VAST compounds

Our diverse AI-powered solutions address challenges across drug discovery, materials R&D and more—accelerating scientific progress.

VAST Full Set

Download novel virtual library compounds that are synthetically accessible in 1–2 steps. The Primary Set offers quick and cost-efficient access, while the Advanced Set expands to a larger and more diverse chemical space. The Ro5 set is a drug-like subset that meets the Ro5 and Weber criteria (MW≤500, clogP≤5, HBA≤10, HBD≤5, RotBonds≤10, TPSA≤140) and excludes compounds containing PAINS structural alerts. The beyond Ro5 subset is accessible separately and provides a complement to the conventional drug-like space.

VAST Primary set, Ro5

Total compounds: 73,356,612 Size: 3.77 GB

VAST Primary set, beyond Ro5

Total compounds: 35,039,927 Size: 2.00 GB

VAST Advanced set, Ro5, HAC 11–20

Total compounds: 5,552,383 Size: 282.65 MB

VAST Advanced set, Ro5, HAC 21–25

Total compounds: 234,575,035 Size: 12.08 GB

VAST Advanced set, Ro5, HAC 26–30

Total compounds: 1,457,006,382 Size: 82.28 GB

VAST Advanced set, Ro5, HAC 31–38

Total compounds: 1,635,817,795 Size: 97.41 GB

VAST Advanced set, beyond Ro5

Total compounds: 1,215,843,242 Size: 74.84 GB

VAST Diverse Subsets

Download diverse subsets that represent the full VAST space. The Primary Set offers quick and cost-efficient access, while the Advanced Set expands to an expanded chemical space. The Ro5 set meets the Ro5 and Weber criteria (MW≤500, clogP≤5, HBA≤10, HBD≤5, RotBonds≤10, TPSA≤140) and excludes compounds containing PAINS structural alerts. Analogue search and hit expansion is available for follow-up exploration once a hit is identified.

VAST diverse subset, 1M cmpds

Total compounds: 1,000,000 Size: 55.49 MB

VAST diverse subset, 10M cmpds

Total compounds: 10,000,000 Size: 595.84 MB

VAST Advanced diverse subset, 100M cmpds, Ro5

Total compounds: 100,000,000 Size: 5.56 GB

VAST Primary diverse subset, 0.1M cmpds, Ro5

Total compounds: 100,000 Size: 5.30 MB

VAST Advanced diverse subset, 0.1M cmpds, Ro5

Total compounds: 100,000 Size: 5.91 MB

VAST Advanced diverse subset, 100M cmpds

Total compounds: 100,000,000 Size: 5.78 GB

Unlocking the VAST Novel Chemical Space

Diversity distribution scatter plot

Automated Platform for Faster Synthesis and Reliable Delivery

  • Maximize efficiency with 24/7 AI-guided scheduling
  • Accommodate diverse reactions via modular workstations
  • Accelerate delivery through automated compound management

Following hit identification, we deliver tailored focused library design and hit expansion services—complemented by rapid follow-up synthesis powered by 150 automation-ready reaction protocols expedite your hit optimization workflows with precision and efficiency.

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Drug-like Rules Compliant Property Profiles

Drug-like rules-compliant physicochemical property profiles of the Ro5 subset of VAST library.

Property distribution charts for clogP, HeavyAtomCount, MolWt, TPSA, HBA, HBD, nRotableBonds, and Fsp3

Discover the Future of Scientific Research

XtalPi is dedicated to revolutionizing compound synthesis by automation, AI, and big data. Try VAST in your virtual screening and drug discovery and experience rapid delivery and hit expansion. Watch our video for a cloud lab tour of our automation facility. Contact us today to learn more!