Ro 3-0422

Ro 3-0422
Names
	Preferred IUPAC name 3-[(Diethoxyphosphoryl)oxy]-1-methylquinolin-1-ium methyl sulfate
	Other names 3-(Diethoxyphosphinyloxy)-1-methylquinolinium methylsulfate
Identifiers
CAS Number	5823-09-6;
3D model (JSmol)	Interactive image;
ChemSpider	174347;
PubChem CID	201356;
CompTox Dashboard (EPA)	DTXSID80206962 ;
	SMILES CCOP(=O)(OCC)Oc1cc2ccccc2[n+](c1)C.COS(=O)(=O)[O-];
Properties
Chemical formula	C15H22NO8PS
Molar mass	407.37 g·mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Extremely toxic
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	20 μg/kg (mice, intravenous)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ro 3-0422 is an extremely potent organophosphate acetylcholinesterase inhibitor. It is extremely toxic. The intravenous LD₅₀ is 20 μg/kg in mice.^[1] It is over 300 times more potent than neostigmine.^[2]

References

^ HOBBIGER, F (June 1954). "The inhibition of cholinesterases by 3-(diethoxyphosphinyloxy)-N-methylquinolinium methylsulphate and its tertiary base". British Journal of Pharmacology and Chemotherapy. 9 (2): 159–65. doi:10.1111/j.1476-5381.1954.tb00835.x. PMC 1509437. PMID 13172424.
^ Andrews, K. J. M.; Atherton, F. R.; Bergel, F.; Morrison, A. L. (1954). "Hydroxypyridine and hydroxyquinoline phosphates as anti-cholinesterases". Journal of the Chemical Society (Resumed): 1638. doi:10.1039/jr9540001638.

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