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OTB-658

Chemical Structure : OTB-658

CAS No.: 2245791-50-6

OTB-658 (OTB658)

Catalog No.: PC-20081Not For Human Use, Lab Use Only.

OTB-658 (OTB658) is a novel oxazolidinone anti-tuberculosis agent, shows potent antibacterial activity against Mycobacterium tuberculosis, especially multi-drug resistant tuberculosis (MDR-TB) in vitro and in vivo.

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Purity & Documentation Purity: >98% (HPLC)

Biological Activity

OTB-658 (OTB658) is a novel oxazolidinone anti-tuberculosis agent, shows potent antibacterial activity against Mycobacterium tuberculosis, especially multi-drug resistant tuberculosis (MDR-TB) in vitro and in vivo.
OTB-658 exhibits potent activity against M. tuberculosis H37Rv in the early stage of infection.
OTB-658 has MIC value of 0.080 to 0.115 μg/ml against M. tuberculosis H37Rv.
OTB-658 is active against 10 drug-susceptible and 30 drug-resistant clinical isolates and is as potent as Linezolid and PNU-100480 (Sutezolid).
OTB-658 achieves bacteriostatic effect against M. tuberculosis at the MIC to 32× MIC (MBC).
OTB-658 (25 mg/kg) demonstrates better bacteriostatic activity in the early stage of infection in acute murine models, compared with Linezolid (50 mg/kg). OTB-658 shows no cross-resistance with Isoniazid (INH) and Rifampin (RIF).

Physicochemical Properties

M.Wt 381.42
Formula C17H20FN3O4S
Appearance Solid
CAS No.
Storage
Solide Powder
-20°C 12 Months; 4°C 6 Months
In Solvent
-80°C 6 Months; -20°C 6 Months
Shipping
Solubility

10 mM in DMSO

Chemical Name/SMILES

N-(((3S,3aS)-8-fluoro-1-oxo-7-thiomorpholino-3a,4-dihydro-1H,3H-benzo[b]oxazolo[3,4-d][1,4]oxazin-3-yl)methyl)acetamide

References

1. Guo S, et al. Antimicrob Agents Chemother. 2021 Oct 18;65(11):e0097421.

2. Liu H, et al. Antimicrob Agents Chemother. 2023 Feb 16;67(2):e0139922.

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