Ricinine

Ricinine is a toxic alkaloid found in the castor plant.^[2] It can serve as a biomarker of ricin poisoning.^[3][4] It was first isolated from the castor seeds by Tuson in 1864.^[5][6]

Ricinine

Names
Preferred IUPAC name 4-Methoxy-1-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile
Other names 3-cyano-4-methoxy-N-methyl-2-pyridone
Identifiers
CAS Number	524-40-3
3D model (JSmol)	Interactive image
3DMet	B00311
ChEBI	CHEBI:18043
ChEMBL	ChEMBL1329957
ChemSpider	10216
ECHA InfoCard	100.007.601
EC Number	208-359-7
KEGG	C01526
PubChem CID	10666
UNII	130UFS7AE0
CompTox Dashboard (EPA)	DTXSID50200412
InChI InChI=1S/C8H8N2O2/c1-10-4-3-7(12-2)6(5-9)8(10)11/h3-4H,1-2H3 Key: PETSAYFQSGAEQY-UHFFFAOYSA-N
SMILES Cn1ccc(c(c1=O)C#N)OC
Properties
Chemical formula	C8H8N2O2
Molar mass	164.164 g·mol−1
Melting point	200 °C (392 °F; 473 K)
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	340 mg/kg[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ricinine has insecticidal effects.^[7]

It sublimes between 170 and 180 °C at 20 mmHg. It does not form salts, and is precipitated in iodine or mercuric chloride solutions, but not in Mayer's reagent.^[5]

It can be hydrolyzed to methanol and ricininic acid by alkali.^[5]