Fluoroiodomethane (also known as Fluoromethyl Iodide, FIM) is a reagent for the introduction of the fluoromethyl (FCH2) group. It is typically used as non-ozone depleting alternative to Bromofluoromethane (BFM) for fluoromethylation of steroids, including fluticasone propionate and fluticasone furoate.
Synthesis and Structure-Activity Relationships in a Series of Antiinflammatory Corticosteroid Analogs, Halomethyl Androstane-17.beta.-carbothioates and -17.beta.-carboselenoates. 
Synthesis of Monofluoromethylthioesters from Aldehydes. 
 G.H.Phillipps, et al, J. Med. Chem., 1994, 37(22), pp 3717-3729.
 G.Landelle, et al, 2011, Encyclopedia of Reagents for Organic Synthesis. e-EROS Encyclopedia of Reagents for Organic Synthesis.