Phthalazinone

Phthalazinone

SCHEMBL2473799

O=c1[nH]ncc2ccccc12.[N]

nearest known ligand 0.96

Full drug profile on Sugi Atlas →

Predicted protein targets (top 20)

geneUniProtsupporting neighboursconfidence
PARP1 P09874 3/20 0.96
HSD17B10 Q99714 2/20 0.96
TDP1 Q9NUW8 2/20 0.96
ALDH1A1 P00352 1/20 0.96
PRKCI P41743 1/20 0.96
PDE4B Q07343 1/20 0.96
MAPK1 P28482 1/20 0.57
HSP90AA1 P07900 1/20 0.48
IDO1 P14902 1/20 0.48
CDK2 P24941 1/20 0.48
PRMT5 O14744 1/20 0.43
ABCB1 P08183 1/20 0.42
KDM4E B2RXH2 2/20 0.41
ATM Q13315 1/20 0.41
NPSR1 Q6W5P4 1/20 0.41
GAA P10253 1/20 0.41
CYP1A2 P05177 2/20 0.41
L3MBTL1 Q9Y468 2/20 0.41
LMNA P02545 2/20 0.41
AR P10275 1/20 0.41

Click a target to see other patent compounds predicted against it — the reverse direction, in place.

Similar compounds — the chemically nearest patent molecules

Nearest neighbours by Morgan-fingerprint cosine across the patent-compound collection, with each neighbour's top predicted target and the predicted targets it shares with this molecule.

Compoundsimilaritytop predictedshared targets
Phthalazinone SCHEMBL51553 0.98 PARP1 (1.00) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL11516875 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL11516881 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL11519239 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL9617397 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL11519244 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL11690359 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL4663241 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL2962226 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI
Phthalazinone SCHEMBL28416004 0.96 PARP1 (0.96) PARP1HSD17B10TDP1ALDH1A1PRKCI

Similarity is cosine over the 2,048-bit Morgan fingerprint (≈ Tanimoto). Identical fingerprints score 1.00.

Patent provenance — the patents this molecule appears in, and who filed them

Claimed or disclosed in 20 patents. claimed = in the patent's claims; disclosed = body only.

PatentTitleAssigneePublishedPriorityFilingCountryStatus
WO-2025227505-A1 HALOGEN-FREE FLAME-RETARDANT POLYURETHANE ELASTOMER AND PREPARATION PROCESS THEREFOR 上海皆利新材料科技有限公司 2025-11-06 WO disclosed
US-20240327375-A1 SUBSTITUTED HETEROBICYCLIC DERIVATIVES AS NEGATIVE ALLOSTERIC MODULATORS OF MGLU7 RECEPTOR ADDEX PHARMA S.A. (CH) 2024-10-03 US disclosed
CN-118108924-B Halogen-free flame-retardant polyurethane elastomer and preparation process thereof 上海皆利新材料科技有限公司 2024-07-02 CN disclosed
CN-118108924-A Halogen-free flame-retardant polyurethane elastomer and preparation process thereof 上海皆利新材料科技有限公司 2024-05-31 CN disclosed
EP-4337643-A1 SUBSTITUTED HETEROBICYCLIC DERIVATIVES AS NEGATIVE ALLOSTERIC MODULATORS OF MGLU7 RECEPTOR Addex Pharma S.A (CH) 2024-03-20 EP disclosed
CN-117597331-A Substituted heterobicyclic derivatives as MGLU7 receptor negative allosteric modulators 阿德克斯法尔马股份公司 2024-02-23 CN disclosed
EP-2824098-A1 Method for the preparation of 4-[3-(4-cyclopropanecarbonyl- piperazine-1-carbonyl)-4-fluoro-benzyl]-2H-phthalazin-1-one Kudos Pharmaceuticals Limited (GB) 2015-01-14 EP disclosed
US-20130123253-A1 MODULATORS OF CENTRAL NERVOUS SYSTEM NEUROTRANSMITTERS HUMAN BIOMOLECULAR RESEARCH INSTITUTE (US) 2013-05-16 US disclosed
US-8247416-B2 Phthalazinone derivative KUDOS PHARMACEUTICALS LIMITED (GB) 2012-08-21 US disclosed
US-8168635-B2 2-(aminomethyl)-5-phenyltetrahydrofuran; 4-(3,4-Dimethoxyphenyl)-2-[5-(2-{5-[2-(5-fluoro-2-methoxyphenyl)-ethyl]-tetrahydrofuran-2-yl}-ethylamino)-pentyl]-4a,5,8,8a-tetrahydro-2H-phthalazin-1-one; dual inhibitor of serotonin reuptake and phosphodiesterase 4 (PDE4) enzyme activity HUMAN BIOMOLECULAR RESEARCH INSTITUTE (US) 2012-05-01 US disclosed
EP-2374800-A2 Methods for the preparation of 4-[3-(4-cyclopropanecarbonyl- piperazine-1-carbonyl)-4-fluoro-benzyl]-2H-phthalazin-1-one Kudos Pharmaceuticals Limited (GB) 2011-10-12 EP disclosed
US-7692006-B2 Phthalazinone derivatives KUDOS PHARMACEUTICALS LIMITED (GB) 2010-04-06 US disclosed
US-20090270617-A1 PHTHALAZINONE DERIVATIVE KUDOS PHARMACEUTICALS LIMITED (GB) 2009-10-29 US disclosed
EP-2064189-A2 POLYMORPHIC FORM OF 4-[3-(4-CYCLOPROPANECARBONYL-PIPERAZINE-1-CARBONYL)-4-FLUORO-BENZYL]-2H-PHTHALAZIN-1-ONE Kudos Pharmaceuticals Limited (GB) 2009-06-03 EP disclosed
US-20080261967-A1 Modulators of Central Nervous System Neurotransmitters HUMAN BIOMOLECULAR RESEARCH INSTITUTE 2008-10-23 US disclosed
US-20080146575-A1 4-[3-(4-cyclopropanecarbonyl-piperazine-1-carbonyl)-4-fluoro-benzyl]-2H-phthalazin-1-one as crystalline; enzyme poly(ADP-ribose)polymerase (synthase)-1 or poly ADP-ribosyltransferase (PARP-1) inhibitor; anticarcinogenic with BRCA2 deficient phenotype; septic shock, ischemic injury, multiple sclerosis KUDOS PHARMACEUTICALS LIMITED (GB) 2008-06-19 US disclosed
WO-2008047082-A2 POLYMORPHIC FORM OF 4-[3-(4-CYCLOPROPANECARBONYL-PIPERAZINE-1-CARBONYL)-4-FLUORO-BENZYL]-2H-PHTHALAZIN-1-ONE KUDOS PHARMACEUTICALS LIMITED (GB) 2008-04-24 WO disclosed
EP-1771435-A4 MODULATORS OF CENTRAL NERVOUS SYSTEM NEUROTRANSMITTERS HUMAN BIOMOLECULAR RES INST (US) 2008-02-13 EP disclosed
EP-1771435-A2 MODULATORS OF CENTRAL NERVOUS SYSTEM NEUROTRANSMITTERS Human Biomolecular Research Institute (US) 2007-04-11 EP disclosed
WO-2006025920-A2 MODULATORS OF CENTRAL NERVOUS SYSTEM NEUROTRANSMITTERS HUMAN BIOMOLECULAR RESEARCH INSTITUTE (US) 2006-03-09 WO disclosed

Patent text — is the patent's own abstract consistent with the prediction?

For each of this compound's patents that has machine-readable text (5 of them — usually the abstract, not the full specification), we ask MedCPT which protein the text reads most about, and where the chemistry-predicted target lands among 4885 human targets. A high rank means the patent's own wording is consistent with the prediction — a weak, independent signal, not proof of activity.

PatentTitleText reads most aboutPredicted target · text-rank
US-20080261967-A1 Modulators of Central Nervous System Neurotransmitters GAP43, SLC18A2, CHRNA6 PARP1 4366/4885HSD17B10 3739/4885TDP1 1124/4885
US-20080146575-A1 4-[3-(4-cyclopropanecarbonyl-piperazine-1-carbonyl)-4-fluoro-benzyl]-2H-phthalazin-1-one as crystalline; enzyme poly(ADP-ribose)polymerase (synthase)-1 or poly ADP-ribosyltransferase (PARP-1) inhibitor; anticarcinogenic with BRCA2 deficient phenotype; septic shock, ischemic injury, multiple sclerosis PARP1, PARP11, PARP2 PARP1 1/4885HSD17B10 1956/4885TDP1 122/4885
US-20090270617-A1 PHTHALAZINONE DERIVATIVE PML, H4C1; H4C2; H4C3; H4C4; H4C5; H4C6; H4C8; H4C9; H4C11; H4C12; H4C13; H4C14; H4C15; H4C16, NCOA4 PARP1 379/4885HSD17B10 859/4885TDP1 3822/4885
US-20240327375-A1 SUBSTITUTED HETEROBICYCLIC DERIVATIVES AS NEGATIVE ALLOSTERIC MODULATORS OF MGLU7 RECEPTOR GRM7, GRM2, GRM1 PARP1 4246/4885HSD17B10 3270/4885TDP1 2268/4885
US-20130123253-A1 MODULATORS OF CENTRAL NERVOUS SYSTEM NEUROTRANSMITTERS GAP43, SLC18A2, CHRNA6 PARP1 4366/4885HSD17B10 3739/4885TDP1 1124/4885

“Text reads most about” is the patent abstract's nearest protein in MedCPT space (background-debiased). Only ~1.4% of patents have machine-readable text, so most compounds won't have this panel.