Tarocin

Tarocin A and tarocin B are two structurally unrelated compounds that inhibit the TarO enzyme involved in teichoic acid biosynthesis in bacteria.

Tarocin A

Names
IUPAC name (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-3-(2-naphthalen-1-ylacetyl)-1,3-oxazolidin-2-one
Identifiers
ChEBI	CHEBI:131612
ChEMBL	ChEMBL4066320
ChemSpider	58163459
PubChem CID	118797938
InChI InChI=1S/C24H17F6NO3/c1-13-21(16-9-17(23(25,26)27)12-18(10-16)24(28,29)30)34-22(33)31(13)20(32)11-15-7-4-6-14-5-2-3-8-19(14)15/h2-10,12-13,21H,11H2,1H3/t13-,21-/m0/s1 Key: GBVCJLDLMGPDCL-ZSEKCTLFSA-N
SMILES CC1C(OC(=O)N1C(=O)CC2=CC=CC3=CC=CC=C32)C4=CC(=CC(=C4)C(F)(F)F)C(F)(F)F
Properties
Chemical formula	C24H17F6NO3
Molar mass	481.394 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tarocin B

Names
IUPAC name 3-(2-cyclohexylbenzimidazol-1-yl)-N-[(1R,2R,4R)-1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl]propanamide
Identifiers
ChEBI	CHEBI:131613
ChEMBL	ChEMBL4570512
ChemSpider	58163460
PubChem CID	118797939
InChI InChI=1S/C26H37N3O/c1-25(2)19-13-15-26(25,3)22(17-19)28-23(30)14-16-29-21-12-8-7-11-20(21)27-24(29)18-9-5-4-6-10-18/h7-8,11-12,18-19,22H,4-6,9-10,13-17H2,1-3H3,(H,28,30)/t19-,22-,26+/m1/s1 Key: SLSHAQAUYNMJCT-SNOBZRMMSA-N
SMILES CC1(C2CCC1(C(C2)NC(=O)CCN3C4=CC=CC=C4N=C3C5CCCCC5)C)C
Properties
Chemical formula	C26H37N3O
Molar mass	407.602 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Using either of them with β-lactam antibiotics seems to be effective in mice against some β-lactam-resistant bacteria.

Because the tarocins lack activity when used alone it may simplify the clinical trials for approval for medical use.

Further reading

• S. H. Lee; et al. (2016). "TarO-specific inhibitors of wall teichoic acid biosynthesis restore β-lactam efficacy against methicillin-resistant staphylococci". Science Translational Medicine. 8 (329): 329ra32. doi:10.1126/scitranslmed.aad7364. PMID 26962156. S2CID 293094.
• Swoboda, J. G; Campbell, J; Meredith, T. C; Walker, S (2010). "Wall Teichoic Acid Function, Biosynthesis, and Inhibition". ChemBioChem. 11 (1): 35–45. doi:10.1002/cbic.200900557. PMC 2798926. PMID 19899094.