Record Information
Version1.0
Creation Date2014-08-30 21:05:57 UTC
Update Date2026-04-05 10:44:13 UTC
Accession NumberCHEM003530
Identification
Common NameFludiazepam
ClassSmall Molecule
DescriptionFludiazepam is a drug which is a benzodiazepine derivative. It possesses anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties. It is a scheduled drug in the U.S., but is approved for use in Japan.
Contaminant Sources
  • HMDB Contaminants - Urine
  • T3DB toxins
Contaminant Type
  • Amide
  • Amine
  • Benzodiazepine
  • Drug
  • Organic Compound
  • Organochloride
  • Organofluoride
  • Synthetic Compound
Chemical Structure
Thumb
Synonyms
ValueSource
7-Chloro-5-(O-fluorophenyl)-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-oneChEBI
ErispanChEBI
FludiazepanHMDB
1-Methyl-5-(2-fluorophenyl)-7-chloro-1,3-dihydro-2H-(1,4)benzodiazepin-2-oneHMDB
Chemical FormulaC16H12ClFN2O
Average Molecular Mass302.731 g/mol
Monoisotopic Mass302.062 g/mol
CAS Registry Number3900-31-0
IUPAC Name7-chloro-5-(2-fluorophenyl)-1-methyl-2,3-dihydro-1H-1,4-benzodiazepin-2-one
Traditional Namefludiazepam
SMILESCN1C2=C(C=C(Cl)C=C2)C(=NCC1=O)C1=CC=CC=C1F
InChI IdentifierInChI=1S/C16H12ClFN2O/c1-20-14-7-6-10(17)8-12(14)16(19-9-15(20)21)11-4-2-3-5-13(11)18/h2-8H,9H2,1H3
InChI KeyROYOYTLGDLIGBX-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as 1,4-benzodiazepines. These are organic compounds containing a benzene ring fused to a 1,4-azepine.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassBenzodiazepines
Sub Class1,4-benzodiazepines
Direct Parent1,4-benzodiazepines
Alternative Parents
Substituents
  • 1,4-benzodiazepine
  • Alpha-amino acid or derivatives
  • Fluorobenzene
  • Halobenzene
  • Aryl chloride
  • Aryl fluoride
  • Aryl halide
  • Monocyclic benzene moiety
  • Benzenoid
  • Tertiary carboxylic acid amide
  • Carboxamide group
  • Ketimine
  • Lactam
  • Azacycle
  • Carboxylic acid derivative
  • Organic 1,3-dipolar compound
  • Propargyl-type 1,3-dipolar organic compound
  • Organooxygen compound
  • Imine
  • Organopnictogen compound
  • Organic oxygen compound
  • Organic nitrogen compound
  • Carbonyl group
  • Hydrocarbon derivative
  • Organic oxide
  • Organonitrogen compound
  • Organohalogen compound
  • Organochloride
  • Organofluoride
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
Applications
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateSolid
AppearanceWhite powder.
Experimental Properties
PropertyValue
Melting Point218.5-219°C
Boiling PointNot Available
SolubilityNot Available
Predicted Properties
PropertyValueSource
Water Solubility0.014 g/LALOGPS
logP2.83ALOGPS
logP3.22ChemAxon
logS-4.3ALOGPS
pKa (Strongest Basic)1.89ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area32.67 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity80.03 m³·mol⁻¹ChemAxon
Polarizability29.45 ųChemAxon
Number of Rings3ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-00rb-1290000000-db34d4ae17fe6cf3b0ceSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0udi-0009000000-b2b78d93d910447bac75Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0udi-0009000000-a3a8b605f4519d7b3f3eSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-3790000000-fdbf33d4f6fc63137032Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0udi-0009000000-d02f66b89dd2bd046268Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0udi-0019000000-192b14d7bf485cfa6ad1Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0fri-4090000000-384ca37be75332aae71eSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0udi-0009000000-c01193f4b7d1e5f3a22bSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0udi-0029000000-f4108b88eded0bee1211Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-052r-0691000000-5f13769812ae66b4fb7aSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0udi-0009000000-7a97a80624fe91a9d550Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0udi-0019000000-e2f274918639146a9afeSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-001j-0090000000-8fa0ab5ce849828b1d1dSpectrum
MSMass Spectrum (Electron Ionization)splash10-0uk9-2794000000-6f1a3e2e0783b2069f2fSpectrum
Toxicity Profile
Route of ExposureNot Available
Mechanism of ToxicityFludiazepam has similar action to diazepam, but binds with four times more affinity to benzodiazepine receptors than diazepam.
MetabolismHepatic.
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesUsed for the short-term treatment of anxiety disorders.
Minimum Risk LevelNot Available
Health EffectsNot Available
SymptomsSymptoms of overdose include drowsiness, weakness, nausea, dizziness, abdominal pain, cerebral oedema and renal tubular necrosis, hyperglycaemia and hypoglycaemia, liver damage, encephalopathy, coma and death.
TreatmentGeneral supportive measures should be employed, along with intravenous fluids, and an adequate airway maintained. Hypotension may be combated by the use of norepinephrine or metaraminol. Dialysis is of limited value. Flumazenil (Anexate) is a competitive benzodiazepine receptor antagonist that can be used as an antidote for benzodiazepine overdose. In particular, flumazenil is very effective at reversing the CNS depression associated with benzodiazepines but is less effective at reversing respiratory depression. Its use, however, is controversial as it has numerous contraindications. It is contraindicated in patients who are on long-term benzodiazepines, those who have ingested a substance that lowers the seizure threshold, or in patients who have tachycardia or a history of seizures. As a general rule, medical observation and supportive care are the mainstay of treatment of benzodiazepine overdose. Although benzodiazepines are absorbed by activated charcoal, gastric decontamination with activated charcoal is not beneficial in pure benzodiazepine overdose as the risk of adverse effects often outweigh any potential benefit from the procedure. It is recommended only if benzodiazepines have been taken in combination with other drugs that may benefit from decontamination. Gastric lavage (stomach pumping) or whole bowel irrigation are also not recommended.
Concentrations
Not Available
DrugBank IDDB01567
HMDB IDHMDB0015513
FooDB IDNot Available
Phenol Explorer IDNot Available
KNApSAcK IDNot Available
BiGG IDNot Available
BioCyc IDNot Available
METLIN IDNot Available
PDB IDNot Available
Wikipedia LinkFludiazepam
Chemspider ID3252
ChEBI ID31618
PubChem Compound ID3369
Kegg Compound IDNot Available
YMDB IDNot Available
ECMDB IDNot Available
References
Synthesis Reference

Yamamato, H., Inaba, S.,Okamoto, T., Hirohashi, T., Ishizumi, K., Yamamoto, M., Maruyama, l., Mori, K. and Kobayashi, T.; U.S. Patents 3,723,461; March 27, 1973; 3,828,027; August 6, 1974 and 3,925,364; December 9, 1975; all assigned to Sumitomo Chemical Co., Ltd.

MSDSNot Available
General References
1. Ishiwata K, Yanai K, Ido T, Miura-Kanno Y, Kawashima K: Synthesis and biodistribution of [11C]fludiazepam for imaging benzodiazepine receptors. Int J Rad Appl Instrum B. 1988;15(4):365-71.
2. Nakatsuka I, Shimizu H, Asami Y, Katoh T, Hirose A, Yoshitake A: Benzodiazepines and their metabolites: relationship between binding affinity to the benzodiazepine receptor and pharmacological activity. Life Sci. 1985 Jan 14;36(2):113-9.