ent18,861 ent18,861[qr] Methyl chlorothion methylchlorothion methylchlorothion[qr] O-(3-Chloor-4-nitro-fenyl)-O,O-dimethyl-monothiofosfaat o-(3-chloor-4-nitro-fenyl)-o,o-dimethyl-monothiofosfaat[dutch][qr] O-(3-Chlor-4-nitro-phenyl)-O,O-dimethyl-monothiophosphat