Thiocarbarsone

[p-Ureidophenylarsylenebis(thio)]diacetic acid

2-[[(carboxymethylthio)-(4-ureidophenyl)arsino]thio]acetic acid

2-[[4-(carbamoylamino)phenyl]-(carboxymethylsulfanyl)arsanyl]sulfanyla cetic acid

2-[[4-(aminocarbonylamino)phenyl]-(carboxymethylsulfanyl)arsanyl]sulfanylethanoic acid