Mesna, sold under the brand name Mesnex among others, is a medication used in those taking cyclophosphamide or ifosfamide to decrease the risk of bleeding from the bladder. It is used either by mouth or injection into a vein.
Disodium tetracarbonylferrate is the organoiron compound with the formula Na2[Fe(CO)4]. It is always used as a solvate, e.g. with tetrahydrofuran or dimethoxyethane which bind to the sodium cation. mainly to synthesise aldehydes. This oxygen-sensitive colourless solid is a reagent in organometallic and organic chemical research but is not of commercial value.