Igniting Therapeutic Innovation with Molecular Intelligence

We unite AI, expansive chemical space, and biological insight to deliver smarter molecules, richer data, and novel opportunities for breakthrough therapies.

Explore Our Chemical Spaces
Advance your hit discovery, lead optimization program, or custom screening strategy by 
integrating our diverse and well-curated chemical spaces—designed to accelerate and 
strengthen your research pipeline.
Connect With Us

Use our contact form or email us directly to schedule an introductory call. We’re ready to learn about your goals and explore how we can support your discovery efforts.

Collaborate and Launch
Work alongside our scientific specialists to tailor chemistry workflows, leverage advanced 
compound selection algorithms and synthetic strategies, and accelerate the success of your 
discovery campaign.

Your Project, Powered by Our Chemistry

REAXENSE™ is a powerful AI-enabled platform built to unlock novel chemical space for 
therapeutic innovation. By combining vast in-stock and virtual compound libraries, peptide 
and macrocycle design tools, and dynamic protein characterization for 8,800+ targets, 
REAXENSE helps researchers discover, optimize, and synthesize smarter molecules—faster 
and more precisely than ever before.

REAXENSE dedicated chemical spaces

ChemoVista™

The AI-Driven Chemical Space for Drug Discovery

Key features:

8 Million+ Ready-to-Use Compounds

A vast chemical repository optimized for hit identification, lead optimization, and high-throughput screening.

AI-Optimized Selection & Smart Filtering

Seamlessly integrated with Receptor.AI, ChemoVista enables AI-powered virtual screening, SAR modeling, and data-driven compound selection. The space is curated for:

  • Diverse molecular architectures (T mean < 0.35, broad scaffold coverage, sp²/sp³ balance, ~2,500,000 of unique Murcko scaffolds)
  • Optimized physicochemical properties (MW, cLogP, HBD, HBA, TPSA, RB) – 90% of ChemoVista are drug-like (Ro5-compliant) compounds
  • ADMET-compatible profiles (MW, cLogP, HBD, HBA, TPSA, RB) – 90% of ChemoVista are drug-like (Ro5-compliant) compounds
  • Commercial Availability: 100% in-stock and competitive pricing for seamless procurement.
Instant Global Availability & Customization

Plated compounds, custom assay plates, and bulk supply options ready for immediate worldwide shipment.

High-Purity Standards & Analytical Validation

Every compound undergoes HPLC, NMR, MS, and stability testing, ensuring reproducibility and high-quality data. Purity: min 90%, max 99%.

Seamless Integration with Computational Workflows

Compounds provided in standardized formats (SDF, SMILES, InChI, etc.), ensuring compatibility with computational pipelines and AI-driven screening.

Advanced Logistics & Hassle-Free Delivery

Single-package shipments, temperature-controlled handling for DMSO solutions, and free customs clearance for US & EU customers.

Expand list

VirtuSynthium™

AI-Powered Virtual Chemical Space for Next-Generation Drug Discovery

Key features:

Unparalleled Scale & Diversity

VirtuSynthium provides access to a virtual library of 10¹⁶ synthetically accessible molecules—the largest AI-navigable chemical space available — constructed through the combinatorial application of over 1,000,000 validated reagents and building blocks using diverse, reaction-aware design protocols for dynamic and scalable molecular generation.

AI-Driven Discovery & Optimization

Advanced machine learning, predictive ADMET modeling, and AI-guided virtual screening enable precise compound selection for high-impact drug discovery.

Synthesis-Ready Molecules

Unlike static enumerated libraries, VirtuSynthium incorporates real-time synthetic feasibility assessment using over 1,000 validated reaction pathways and qualified building blocks, ensuring that each proposed compound is practically accessible and can be synthesized and delivered within industry-standard lead times, starting from as little as 4 weeks.

What Makes VirtuSynthium Composed of Quadrillions of Molecules?
Key Factors Unpacked:
Category Factor Description Typical Range / Example
Combinatorial Building blocks (BBs) Input molecules (e.g., amines, acids, aldehydes) 100 – 100,000 per class
Reaction steps Sequential synthetic steps (1–4 typical) 1–4 steps; exponential growth (e.g., 1k³ = 10⁹)
Substitution positions Number of R-group attachment points on scaffolds 2–6 positions
Substituent diversity Number of substituents per position 10–10,000
Scaffold cores Distinct molecular cores or frameworks 1,000 – 1,000,000
Structural Stereoisomers 2ⁿ where n = number of stereocenters Up to 2⁸ = 256
Tautomers / Protonation states Variants of same molecule 1–5 per structure
Tanimoto similarity (diversity threshold) Measures uniqueness in fingerprint space Typical cutoff: 0.75 – 0.85
Ring systems Distinct cyclic frameworks 100,000+ possible
Physicochemical Molecular weight Size filter to maintain drug-/lead-/fragment-likeness <350 (fragment), <500 (drug-like), >500 (bRo5)
cLogP / cLogD Lipophilicity filter -2 to 5 (drug-like)
H-bond donors / acceptors Structural filter for oral bioavailability ≤5 donors, ≤10 acceptors
TPSA / Rotatable bonds Controls permeability and flexibility TPSA < 140 Ų; ≤10 rotatable bonds
Rule-based filters (PAINS, REOS, etc.) Remove unwanted motifs Binary (pass/fail per structure)
Computational Storage and enumeration Raw memory or disk space for storing molecules 1 trillion SMILES ≈ ~100 TB uncompressed
Fingerprint indexing Efficient representation (e.g., ECFP4, MHFP) 256–2048 bits per molecule
On-demand vs pre-enumerated Whether molecules are pre-built or generated live On-the-fly preferred at >10⁹ scale
Search speed (per query) Speed for similarity or substructure search <1 second for 10⁹ molecules using optimized tools
Synthetic Feasibility Reaction rules (RECAP, BRICS, SMARTS-defined) Determines synthetic routes and bond types allowed 50–1,000 generic reactions
Commercial & Tangible BB availability Whether BBs are purchasable 100K – 10M
Synthetic accessibility score (SAS) Machine-learned or rule-based score for ease of synthesis Scale: 1 (easy) – 10 (hard)
Application-Driven Target class constraints Filters based on target type (e.g., kinase hinge binders, GPCR-like) Custom pharmacophore-based rules
3D shape similarity Compared to known ligands (e.g., FTrees similarity) Threshold: 0.80 – 0.95
Patent novelty / FTO filters Exclude structures too similar to known compounds Similarity or substructure filters (Tanimoto < 0.7 to known space)
Expand list
Synthetic Accessibility Score

SAS < 7 ensures that AI-generated molecules are not only innovative but also synthetically actionable, streamlining the path from design to synthesis and ultimately, to clinical relevance.

Seamless Integration with Receptor.AI

Directly embedded in the REAXENSE platform, facilitating hit identification, lead optimization, and structure-based drug design with IP-free exploration.

Expanding Drug Discovery Horizons

Balances Rule of Five (Ro5) and Beyond Ro5 (bRo5) compounds, including macrocycles, peptidomimetics, and PROTAC-like structures, for tackling previously undruggable targets.

Accelerating Drug Development

VirtuSynthium streamlines hit-to-lead workflows by integrating AI-driven compound prioritization with synthetic feasibility modeling, significantly reducing development timelines, cost burdens, and attrition rates — thereby enabling researchers to efficiently navigate and exploit untapped regions of chemical space.

Expand list

OmniPeptide Nexus™

AI-Powered Peptide Design

Key features:

Limitless Peptide Generation
  • Cyclic peptides for enhanced metabolic stability and membrane permeability.
  • Branched and dendritic architectures for multivalent binding or scaffold rigidity.
  • Stapled peptides using hydrocarbon linkers to stabilize α-helical structures and modulate protein–protein interactions.
  • Chemically modified peptides, such as N-methylated backbones, D-amino acid incorporation, and unnatural amino acid substitutions to resist proteolysis and enhance selectivity.
Key Factors in OmniPeptide Nexus Peptide Design
Category Details
Peptide Length Short: 2–10 AA; Medium: 10–50 AA; Long: 50+ AA
Sequence Diversity 20⁵ = 3.2×10⁶ (5-mer); 20¹⁰ = 1.02×10¹³ (10-mer)
Amino Acid Options 20 standard AA; 500+ non-standard AA
Structural Constraints α-helix: ~3.6 AA/turn, 5.4 Å pitch; β-strand: ~3.5 Å/AA; Cyclic turn: 7–10 AA
Stability Factors Half-life: minutes–hours; enhanced by D-AAs, N-methylation, cyclization
Binding Strength Kd: low μM to nM; H-bonds: ~2–5 kcal/mol; Salt bridges: ~1–3 kcal/mol
Binding Strength SPPS up to ~50 AA; Coupling efficiency: 95–99% per step

Each sequence is contextually generated based on target-specific information, including predicted or experimentally resolved binding pockets, known epitope regions, or disease-relevant motifs.

Receptor.AI’s platform integrates LLM-based literature mining, protein-ligand co-evolution analysis, and sequence-to-function prediction algorithms, enabling the rapid generation of peptide libraries that are structurally diverse, IP-novel, and therapeutically actionable.

Structure-Aware Optimization

Use Receptor.AI’s ensemble-based conformational analysis to model dynamic peptide structures. Integrate real-time 3D visualization and AI-guided SAR tools for affinity, selectivity, and stability optimization.

Smart Target Engagement

Predict and rank peptide-target interactions using Receptor.AI’s proprietary deep learning models for binding affinity, ADMET, and immunogenicity. Map interactions with protein–protein interfaces and allosteric sites.

Peptide Engineering & Modification

Enhance pharmacokinetics via AI-driven prediction of cyclization, PEGylation, lipidation, or D-amino acid substitutions—guided by Receptor.AI’s molecular dynamics and de novo design engines.

Seamless Synthesis Integration

Transition from design to synthesis using automated planning and virtual reagent matching within the REAXENSE ecosystem. Deliver peptides at scale, from research-grade to GMP-compliant formats.

Designed for Advanced Therapeutics

Ideal for oncology, infectious diseases, immunotherapy, and targeting “undruggable” PPIs. OmniPeptide Nexus empowers faster, smarter peptide drug discovery—fully embedded in Receptor.AI’s discovery pipeline.

Expand list

MacroCyclePro™

AI-Driven Macrocyclic Drug Discovery Platform

Key features:

De Novo Macrocycle Generation via Deep Learning

Utilizes transformer-based models and generative algorithms (e.g., ProtGPT, LSTM, GANs) to design chemically and structurally diverse macrocycles—including cyclic peptides, bridged scaffolds, and peptidomimetics—optimized for target engagement, stability, and synthesis.

Design Principles Behind MacroCyclePro
Category Parameter Typical Values / Notes
Ring Size Small Macrocycles 8–12 atoms (strained, less common)
Medium Macrocycles 12–20 atoms (optimal for bioactivity)
Large Macrocycles >20 atoms (flexible, e.g. antibiotics)
Preferred Peptide Macrocycles 14–20 atoms
Cyclization Energy Cost ~5–15 kcal/mol (entropy loss)
Conformation Average Diameter 5–15 Å
Intramolecular H-bond Contribution ~2–5 kcal/mol each
Rotatable Bonds ≤8 improves oral bioavailability
Bioactivity Binding Affinity (Kd) low μM to nM range
Molecular Weight Can exceed 500 Da
cLogP Tolerated range: 2–6
Total Polar Surface Area (TPSA) ≤140 Ų improves permeability
Synthesis Step Efficiency 80–95%
Cyclization Concentration mM–μM range
Ring-Closing Metathesis (RCM) Success Rate >70% for medium rings
NRPS Cyclization Efficiency ~95%
Pharmacokinetics Hydrogen Bond Donors ≤4–5 improves permeability
Hydrogen Bond Acceptors ≤10–12 recommended
Plasma Half-Life Typically 1–10 hours; extendable
Protease Stability Improved 10–100× by cyclization
Stability Enhancers N-methylation and d-amino acids enhance stability
Expand list
Diversity-Oriented Synthesis (DOS) Framework

MacroCyclePro leverages a multi-tiered DOS strategy to construct structurally diverse, stereochemically rich macrocyclic libraries. The platform implements both algorithmic assembly routes and ring distortion tactics to expand scaffold complexity and chemical space coverage:

  • Algorithmic Methods: Includes modular Build/Couple/Pair (B/C/P) workflows, iterative coupling (e.g., B/C/C/C/P), and cascade-based Initiate/Propagate/Terminate strategies. These approaches enable fine-grained control over ring size, topology, and functional group placement.
  • Fragment-Based Domain Shuffling: Modular permutation of chemically orthogonal fragments enables scaffold recombination and novel topology generation—ideal for exploring ligand-efficient binding modes.
  • Symmetric & Iterative Synthesis: Employs Two-Directional Synthesis for symmetrical precursor elaboration and Successive Ring Expansion (SuRE) protocols to iteratively enlarge macrocyclic rings via acylation and rearrangement.
  • Ring Distortion Techniques: Starts from complex or natural-product-inspired frameworks and diversifies them via ring expansions, pericyclic transformations (e.g., Diels–Alder/retro-Diels–Alder), and scaffold rearrangement. These reactions enable rapid generation of topologically unique, conformationally preorganized macrocycles.
  • Together, these strategies ensure broad coverage of skeletal, stereochemical, and appendage diversity, enabling access to macrocycles with properties tuned for bRo5 compatibility, synthetic feasibility, and challenging biological targets.
AI-Driven Virtual Screening & Target-Specific Optimization

Integrated with Receptor.AI, the platform enables real-time binding affinity prediction, conformational scoring, and ADMET profiling. Structural optimization workflows refine hits into high-quality leads with enhanced pharmacological properties.

Exceptional Binding Modality for Challenging Targets

MacroCyclePro is purpose-built to tackle flat, groove-shaped, and tunnel-like protein interfaces—such as protein–protein interactions—through preorganized, conformationally restricted scaffolds capable of chameleonic behavior and ternary complex formation.

Exploration of Beyond Rule of 5 Chemical Space

Focuses on chemically privileged macrocyclic space with rich stereochemistry, increased polar surface area, and high molecular weight—balancing permeability, solubility, and bioavailability via intra-molecular hydrogen bonding and scaffold engineering.

Synthetic Feasibility & Scalable Production

Every AI-designed macrocycle is paired with a validated, cost-effective synthetic route. MacroCyclePro supports parallel solid-phase peptide synthesis, native ligation, and custom modifications with up to 99% purity in both research and GMP-grade formats.

Advanced Formulation & Delivery Innovation

Predictive AI tools guide PEGylation, lipidation, and encapsulation into nanoparticles or microneedles to engineer orally bioavailable and injectable macrocyclic drugs with sustained release and improved pharmacokinetics.

Expand list

Contact us

Do you have a question?

Please complete our contact form and a member of our team will get in touch as soon as possible.

Submit
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.