Flunitazene

Not to be confused with Fluetonitazene.

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]}

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
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

See also

• Clonitazene
• Isotonitazene
• List of benzimidazole opioids