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Nerandomilast

CAT: 0013-GTR19208855-01Size: 1 mgDry Ice: NoHazardous: No
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CAT#:0013-GTR19208855-01Size:1 mg
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24/48H Stock Items & 2 to 6 Weeks non Stock Items.
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Description
BI 1015550 (Nerandomilast) is a potent and selective PDE4B inhibitor (IC50 = 7.2 nM) for research use. It demonstrates anti-inflammatory and anti-fibrotic activity in preclinical models, supporting its investigation for conditions like COPD, pulmonary fibrosis, and allergic diseases.
CAS Number
1423719-30-5
Product Name Alternative
BI 1015550, BI1015550, BI-1015550, PDE4B
Field of Research
Metabolism Research
Purity
98.06% (May vary between batches)
Solubility
DMSO:4.49 mg/mL (10 mM)
Smiles
N (C1=C2C (=NC (=N1) N3CCC (CC3) C=4N=CC (Cl) =CN4) CCS2=O) C5 (CO) CCC5
Molecular Formula
C20H25ClN6O2S
Molecular Weight
448.97
Storage Conditions
-20°C
Notes
For research use only.

Chemical Information

BI 1015550

Nerandomilast is a phosphodiesterase 4 (PDE4) inhibitor that preferentially inhibits the PDE4B subtype. It has one chiral center and is the R-stereoisomer. On October 7, 2025, nerandomilast was approved as the first new treatment for idiopathic pulmonary fibrosis in more than a decade. Nerandomilast exerts both anti-fibrotic and immunomodulatory effects as PDE4 inhibition elevates intracellular cAMP levels and reduces the expression of pro-fibrotic growth factors and inflammatory cytokines, which are overexpressed in IPF. Compared to pan-PDE4 inhibitors, selective PDE4B inhibitors are associated with a lower potential for gastrointestinal adverse events. On December 19, 2025, the U.S. FDA approved nerandomilast tablets for the treatment of progressive pulmonary fibrosis (PPF) in adults. In the Phase 3 FIBRONEER-ILD trial, nerandomilast led to a smaller decline in forced vital capacity (FVC) than placebo over 52 weeks.

CAS Number1423719-30-5
PubChem CID166177189
IUPAC Name[1-[[(5R)-2-[4-(5-chloropyrimidin-2-yl)piperidin-1-yl]-5-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-4-yl]amino]cyclobutyl]methanol
Molecular FormulaC20H25ClN6O2S
Molecular Weight449.0
XLogP1.3
Topological Polar Surface Area123
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count9
Rotatable Bond Count5
Heavy Atom Count30
Formal Charge0
Complexity624
SMILES
C1CC(C1)(CO)NC2=NC(=NC3=C2[S@](=O)CC3)N4CCC(CC4)C5=NC=C(C=N5)Cl
InChI
InChI=1S/C20H25ClN6O2S/c21-14-10-22-17(23-11-14)13-2-7-27(8-3-13)19-24-15-4-9-30(29)16(15)18(25-19)26-20(12-28)5-1-6-20/h10-11,13,28H,1-9,12H2,(H,24,25,26)/t30-/m1/s1
InChIKey
UHYCLWAANUGUMN-SSEXGKCCSA-N
Chemical Structure
2D Structure
2D structure of BI 1015550
CAS: 1423719-30-5
CID: 166177189
Formula: C20H25ClN6O2S
MW: 449.0
Interactive 3D Structure
Loading 3D structure...
View on PubChemRaw 3D data
Computed Properties
PropertyValue
Molecular Weight449.0
XLogP31.3
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count9
Rotatable Bond Count5
Exact Mass448.1448229
Monoisotopic Mass448.1448229
Topological Polar Surface Area123 Ų
Heavy Atom Count30
Formal Charge0
Complexity624
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently-Bonded Unit Count1
Compound Is CanonicalizedYes

Alternative Products

CatalogName
HY-153192-01Nerandomilast
HY-153192A-01Nerandomilast (dihydrate)
CS-O-60401Nerandomilast-d5
E1382-25mgNerandomilast (BI 1015550)
CS-O-65246Nerandomilast O-Glucuronide M624 (1)
CS-O-65245Nerandomilast Thioether Metabolite M4329 (BI 764334)

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