| | Identification | Back Directory |  | [Name] 
 ORITAVANCIN
 |  | [CAS] 
 171099-57-3
 |  | [Synonyms] 
 CS-2274
 Orbactiv
 LY 333328
 ORITAVANCIN
 171099-57-3
 brand name: Orbactiv
 Oritavancin (LY333328)
 Oritavancin, trifluoacetate salt
 Oritavancin (Lyophilized Powder For IV Infusion)
 rideoxy-3-methyl-α-L-arabino-hexopyranosyl)-β-D-g
 LY333328; LY-333328; LY 333328; ORITAVANCIN; BRAND NAME: ORBACTIV
 (4R)-22-O-(3-Amino-2,3,6-trideoxy-3-C-methyl-a-L-arabinohexopyranosyl)-N3-(p-(p-chlorophenyl)benzyl)vancomycin
 (4''R)-22-O-(3-Amino-2,3,6-trideoxy-3-C-methyl-alpha-L-arabino-hexopyranosyl)-N3''-[(4'-chloro[1,1'-biphenyl]-4-yl)methyl]vancomycin
 Vancomycin, 22-O-(3-amino-2,3,6-trideoxy-3-C-methyl-α-L-arabino-hexopyranosyl)-N3''-[(4'-chloro[1,1'-biphenyl]-4-yl)methyl]-, (4''R)-
 (1S,2R,18R,19R,22S,25R,28R,40R)-22-(2-Amino-2-oxoethyl)-2-[(3-amino-2,3,6-trideoxy-3-methyl-α-L-arabino-hexopyranosyl)oxy]-5,15-dichloro-48-{[2-O-(3-{[(4'-chloro-4-biphenylyl)methyl]amino}-2,3,6-t
 |  | [Molecular Formula] 
 C86H97Cl3N10O26
 |  | [MDL Number] 
 MFCD09837768
 |  | [MOL File] 
 171099-57-3.mol
 |  | [Molecular Weight] 
 1793.12
 | 
 | Hazard Information | Back Directory |  | [Definition] 
 ChEBI: A semisynthetic glycopeptide used (as its bisphosphate salt) for the treatment of acute bacterial skin and skin structure infections caused or suspected to be caused by susceptible isolates of designated Gram-positive microorganisms including MRSA.
 |  | [Clinical Use] 
 Antibacterial agent
 |  | [Enzyme inhibitor] 
 This novel, semi-synthetic glycopeptide antibiotic (FW = 1793.10 g/mol;
CAS 171099-57-3), also known as LY333328, Orbactiv®, and (4R) -22-O-
3
 (3-amino-2,3,6-trideoxy-3-C-methyl-a-L-arabinohexopyranosyl) -N- (p- (p-
chlorophenyl) benzyl) vancomycin, disrupts the cell membrane of Gram-
positive bacteria and inhibits both transglycosylation and
transpeptidation. Oritavancin differs from vancomycin by the presence
of a hydrophobic N-4- (4-chlorophenyl) benzyl substituent on the
disaccharide, the addition of a 4-epi-vancosamine monosaccharide to the
amino acid residue in Ring-6, and replacement of the vancosamine moiety
by 4-epi-vancosamine. When compared vancomycin, teicoplanin, and
quinupristin-dalfopristin (Synercid) against 219 strains of enterococci and
staphylococci, including vancomycin-resistant enterococci and methicillin-
resistant Staphylococcus aureus, LY333328 demonstrated superior activity
against vancomycin-resistant enterococci and was the only antibiotic which
was bactericidal. Indeed, a single infusion of this antibiotic (1200 mg) can
clear serious bacterial skin infections, including methicillin-resistant
Staphylococcus aureus, or MRSA, as effectively as the usual 7-10 day,
twice-daily regimen of vancomycin now needed to treat patients.
 |  | [Drug interactions] 
 Potentially hazardous interactions with other drugs
 Anticoagulants: possibly increases warfarin 
concentration.
 |  | [Metabolism] 
 In vitro human liver microsome studies indicated that 
oritavancin is not metabolised. It is excreted unchanged; 
less than 1% and 5% of a dose is recovered in the urine 
and the faeces.
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