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LLP019   Click here for help

GtoPdb Ligand ID: 13910

Compound class: Synthetic organic
Comment: LLP019 is a PROTAC degrader that targets the 3CL (main) protease (Mpro) of SARS-CoV-2 [1]. It is a heterobifunctional molecule that carries a pelitinib-derived warhead to bind an allosteric site of Mpro, linked to 4-hydroxy-thalidomide to engage the cereblon (CRBN) E3 ubiquitin ligase. LLP019 was designed to allow exploration of the anti-viral potential of selective Mpro degradation.
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 17
Hydrogen bond donors 4
Rotatable bonds 20
Topological polar surface area 226.85
Molecular weight 830.22
XLogP -0.57
No. Lipinski's rules broken 3

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES CCOC1=CC2=NC=C(C#N)C(=C2C=C1NC(=O)CCOCCOCCNC(=O)COC3=C4C(=CC=C3)C(=O)N(C5CCC(=O)NC5=O)C4=O)NC6=CC=C(C(=C6)Cl)F
Isomeric SMILES CCOC1=CC2=C(C=C1NC(=O)CCOCCOCCNC(=O)COC3=C4C(=O)N(C5CCC(=O)NC5=O)C(=O)C4=CC=C3)C(NC6=CC=C(F)C(Cl)=C6)=C(C=N2)C#N
InChI InChI=1S/C40H37ClFN7O10/c1-2-58-32-18-28-25(37(22(19-43)20-45-28)46-23-6-7-27(42)26(41)16-23)17-29(32)47-34(51)10-12-56-14-15-57-13-11-44-35(52)21-59-31-5-3-4-24-36(31)40(55)49(39(24)54)30-8-9-33(50)48-38(30)53/h3-7,16-18,20,30H,2,8-15,21H2,1H3,(H,44,52)(H,45,46)(H,47,51)(H,48,50,53)
InChI Key KIUYMPSIESOEAA-UHFFFAOYSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
References
1. Veeck C, Laube L, Werner A, Diederich W, Becker S. (2025)
Discovery of an Antiviral PROTAC Targeting the SARS-1 CoV-2 Main Protease Using an Allosteric Warhead.
BioRxiv, Preprint. DOI: 10.1101/2025.05.03.652023