TL-599

{{Redirect|SB-8|the Texas abortion prohibition bill|Texas Heartbeat Act}}

{{Chembox

| ImageFile = TL-599.svg

| Name = TL-599

| OtherNames = SB-8

| PIN = 4-[(Dimethylcarbamoyl)oxy]-N,N,N-trimethyl-2-(propan-2-yl)anilinium iodide

| Section1 = {{Chembox Identifiers|CASNo=63981-53-3|UNII=SD9T6QM997|PubChem=45961|ChemSpiderID=41823|StdInChI=InChI=1S/C15H25N2O2.HI/c1-11(2)13-10-12(19-15(18)16(3)4)8-9-14(13)17(5,6)7;/h8-11H,1-7H3;1H/q+1;/p-1|StdInChIKey=DBMNNBLVHXQGOH-UHFFFAOYSA-M|SMILES=CC(C)c1cc(ccc1[N+](C)(C)C)OC(=O)N(C)C.[I-]}}

| Section2 = {{Chembox Properties

|C=15|H=25|I=1|N=2|O=2}}

| Section3 = {{Chembox Hazards

| LD50= 75 μg/kg (subcutaneous, mice)
168 μg/kg (intraperitoneal, mice)
75 μg/kg (mice, subcutaneous)

| LDLo = 100 μg/kg (guinea pigs, subcutaneous)

}}

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TL-599, also known as SB-8, is an extremely potent carbamate class acetylcholinesterase inhibitor.{{cite book |title=Chemical Warfare Agents, and Related Chemical Problems. Parts I-II |date=1958 |url=https://ntrl.ntis.gov/NTRL/dashboard/searchResults/titleDetail/PB158508.xhtml}}{{cite journal |last1=Stevens |first1=Joseph R. |last2=Beutel |first2=Ralph H. |title=Physostigmine Substitutes |journal=Journal of the American Chemical Society |date=January 1941 |volume=63 |issue=1 |pages=308–311 |doi=10.1021/ja01846a078}}