Phosphorothioic acid, O,O-diethyl O-tetrahydrofurfuryl ester , its cas register number is 3513-92-6. It also can be called Phosphorothioic acid, O,O-diethyl O-((tetrahydro-2-furanyl)methyl) ester (9CI) ; ENT 23,444 ; and Bayer 19564 .