4-ethylphenyl sulfate 4-ethylphenyl sulfate 4-ethylphenyl sulfate (4eps) is a metabolite produced by gut bacteria, which can be toxic when present in large amounts. elevated levels of this metabolite have been associated with some medical conditions including chronic kidney disease and autism. 4-ethylphenyl sulfateidentifiers iupac name (4-ethylphenyl) hydrogen sulfate cas number85734-98-1 ypubchem cid20822574chemical and physical dataformulac8h10o4smolar mass202.22 g·mol−13d model (jsmol)interactive image smiles ccc1=cc=c(c=c1)os(=o)(=o)o inchi inchi=1s/c8h10o4s/c1-2-7-3-5-8(6-4-7)12-13(9,10)11/h3-6h,2h2,1h3,(h,9,10,11)key:dwzglepncrfcep-uhfffaoysa-n