Flunitazene

Flunitazene
Legal status
Legal status	US: Schedule I;
Identifiers
	IUPAC name N,N-diethyl-2-[2-[(4-fluorophenyl)methyl]-5-nitrobenzimidazol-1-yl]ethanamine;
CAS Number	2249-36-7;
PubChem CID	156588967;
ChemSpider	129433227;
UNII	LQS4YF6P6L;
ChEBI	CHEBI:234366;
Chemical and physical data
Formula	C20H23FN4O2
Molar mass	370.428 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CCN(CC)CCN1C2=C(C=C(C=C2)[N+](=O)[O-])N=C1CC3=CC=C(C=C3)F;
	InChI InChI=1S/C20H23FN4O2/c1-3-23(4-2)11-12-24-19-10-9-17(25(26)27)14-18(19)22-20(24)13-15-5-7-16(21)8-6-15/h5-10,14H,3-4,11-13H2,1-2H3; Key:ZTWHIDCAGRMKTC-UHFFFAOYSA-N;

Flunitazene (Fluonitazene) is a benzimidazole derivative with opioid effects, first developed in the 1950s as part of the research that led to better-known compounds such as etonitazene. It is one of the least potent derivatives from this class to have appeared as a designer drug, with only around the same potency as morphine, but nevertheless has been sold since around 2020, and has been linked to numerous drug overdose cases.^[1]^[2]^[3]^[4]^[5]^[6]