Cefmetazole

Chemical compound

J01DC09 (WHO)

Identifiers

IUPAC name

(6R,7S)-7-(2-(cyanomethylthio)acetamido)-7-methoxy-3-((1-methyl-1H-tetrazol-5-ylthio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

CAS Number

56796-20-4^Y

PubChem CID

42008

DrugBank

DB00274^Y

ChemSpider

38311^Y

UNII

3J962UJT8H

KEGG

D00910^Y

ChEBI

CHEBI:3489^Y

ChEMBL

ChEMBL1201195^N

CompTox Dashboard (EPA)

DTXSID7022756

ECHA InfoCard100.054.877

Chemical and physical dataFormulaC₁₅H₁₇N₇O₅S₃Molar mass471.53 g·mol⁻¹3D model (JSmol)

Interactive image

SMILES

O=C2N1/C(=C(\CS[C@@H]1[C@]2(OC)NC(=O)CSCC#N)CSc3nnnn3C)C(=O)O

InChI

InChI=1S/C15H17N7O5S3/c1-21-14(18-19-20-21)30-6-8-5-29-13-15(27-2,17-9(23)7-28-4-3-16)12(26)22(13)10(8)11(24)25/h13H,4-7H2,1-2H3,(H,17,23)(H,24,25)/t13-,15+/m1/s1^Y
Key:SNBUBQHDYVFSQF-HIFRSBDPSA-N^Y

^NY (what is this?) (verify)

Cefmetazole is a cephamycin antibiotic, usually grouped with the second-generation cephalosporins.

Adverse effects

The chemical structure of cefmetazole, like that of several other cephalosporins, contains an N-methylthiotetrazole (NMTT or 1-MTT) side chain. As the antibiotic is broken down in the body, it releases free NMTT, which can cause hypoprothrombinemia (likely due to inhibition of the enzyme vitamin K epoxide reductase) and a reaction with ethanol similar to that produced by disulfiram, due to inhibition of aldehyde dehydrogenase.^[1]

Spectrum of bacterial susceptibility

Cefmetazole is a broad-spectrum cephalosporin antimicrobial and has been effective in treating bacteria responsible for causing urinary tract and skin infections. ^{[citation needed]}The following represents MIC susceptibility data for a few medically significant microorganisms.

Bacteroides fragilis: 0.06 - >256 μg/ml
Clostridium difficile: 8 - >128 μg/ml
Staphylococcus aureus: 0.5 - 256 μg/ml (includes MRSA)^[2]

References

^ Stork CM (2006). "Antibiotics, antifungals, and antivirals". In Nelson LH, Flomenbaum N, Goldfrank LR, Hoffman RL, Howland MD, Lewin NA (eds.). Goldfrank's toxicologic emergencies. New York: McGraw-Hill. p. 847. ISBN 0-07-143763-0. Retrieved 2009-07-03.
^ "Cefmetazole, free acid Susceptibility and Concentration Range (μg/ml) Minimum Inhibitory Concentration (MIC) Data" (PDF). The Antimicrobial Index. TOKU-E. 6 January 2020.

Antibacterials active on the cell wall and envelope (J01C-J01D)

Beta-lactams
(inhibit synthesis
of peptidoglycan
layer of bacterial
cell wall by binding
to and inhibiting
PBPs, a group of
D-alanyl-D-alanine
transpeptidases)

Penicillins (Penams)

Narrow
spectrum

β-lactamase sensitive (1st generation)	Benzylpenicillin (G)^# Benzathine benzylpenicillin^# Procaine benzylpenicillin^# Phenoxymethylpenicillin (V)^# Propicillin^‡ Pheneticillin^‡ Azidocillin^‡ Clometocillin^‡ Penamecillin^‡
β-lactamase resistant (2nd generation)	Cloxacillin^# (Dicloxacillin Flucloxacillin) Oxacillin Nafcillin Methicillin^‡

Extended
spectrum

Aminopenicillins (3rd generation)	Amoxicillin^# Ampicillin^# (Pivampicillin Hetacillin^‡ Bacampicillin^‡ Lenampicillin Metampicillin^‡ Talampicillin^‡) Epicillin^‡
Carboxypenicillins (4th generation)	Ticarcillin Carbenicillin^‡ / Carindacillin^‡ Temocillin^‡
Ureidopenicillins (4th generation)	Piperacillin Azlocillin^‡ Mezlocillin^‡
Other	Mecillinam (Pivmecillinam) Sulbenicillin^‡

Carbapenems / Penems

Cephems
Cephalosporins
Cephamycins
Carbacephems

1st generation	Cefazolin^# Cefalexin ^# Cefadroxil Cefapirin Cefazedone^‡ Cefazaflur^‡ Cefradine^‡ Cefroxadine^‡ Ceftezole^‡ Cefaloglycin^‡ Cefacetrile^‡ Cefalonium^‡ Cefaloridine^‡ Cefalotin Cefatrizine^‡
2nd generation	Cefaclor Cefprozil Cefuroxime Cefuroxime axetil Cefamandole^‡ Cefonicid^‡ Ceforanide^‡ Cefuzonam^‡ Cephamycin (Cefoxitin Cefotetan Cefminox^‡ Cefbuperazone^‡ Cefmetazole^‡) Carbacephem (Loracarbef^‡)
3rd generation	Cefixime^# Ceftriaxone^# Cefotaxime^# Antipseudomonal (Ceftazidime^# Cefoperazone) Cefdinir Cefcapene Cefdaloxime Ceftizoxime Cefmenoxime Cefpiramide Cefpodoxime Ceftibuten Cefditoren Cefotiam^‡ Cefetamet^‡ Cefodizime^‡ Cefpimizole^‡ Cefsulodin^‡ Cefteram^‡ Ceftiolene^‡ Oxacephem (Flomoxef Latamoxef^‡)
4th generation	Cefepime Cefozopran^‡ Cefpirome Cefquinome^‡
5th generation	Ceftaroline fosamil Ceftolozane Ceftobiprole
Siderophore	Cefiderocol^#
Veterinary	Ceftiofur Cefquinome Cefovecin

Monobactams

β-lactamase inhibitors

Combinations

Polypeptides

Glycopeptides Lipoglycopeptides	Inhibit PG chain elongation: Vancomycin^# (Oritavancin Telavancin) Teicoplanin (Dalbavancin) Ristocetin^‡ Avoparcin Inhibit autolysin: Corbomycin (not approved)
Lipopeptides	Insert into bacterial cell wall causing perforation and depolarization: Daptomycin Surfactin
Polymyxins	Bind to LPS in the outer bacterial membrane, acting in detergent-like fashion: Colistin Polymyxin B
Other	Inhibits PG elongation and crosslinking: Ramoplanin^§