technetium (99mtc) exametazime technetium (99mtc) exametazime technetium (99mtc) exametazime is a radiopharmaceutical sold under the trade name ceretec, and is used by nuclear medicine physicians for the detection of altered regional cerebral perfusion in stroke and other cerebrovascular diseases. it can also be used for the labelling of leukocytes to localise intra-abdominal infections and inflammatory bowel disease. exametazime (the part without technetium) is sometimes referred to as hexamethylpropylene amine oxime or hmpao, although correct chemical names are: (ne)-n-amino]-2,2-dimethylpropyl]amino]butan-2-ylidene]hydroxylamine or 3,3'-((2,2,-dimethyl-1,3-propanediyl)diimino)bis-2-butanone dioxime. technetium (99mtc) exametazimeclinical datatrade namescereteclicense data us fda: ceretec routes ofadministrationintravenousatc codev09aa01 (who) v09ha02 (who) (labelled leucocytes)legal statuslegal status us: ℞-only identifiers iupac name dioximato](3–)-n,n',n'',n''']oxotechnetium (99mtc) cas number99944-78-2 npubchem cid9552069unii3b744ag22nchemical and physical dataformulac13h25n4o3tcmolar mass383 g·mol−13d model (jsmol)interactive imageinteractive imagechiralityracemic smiles cc1(c)cn23(n4c1)((oo3=c(c)4c)=c(c)2c)=occ1(c)cn23(n4c1)((oo3=c(c)4c)=c(c)2c)=o ny (what is this?) (verify) chemistry one of the two enantiomers of exametazime the drug consists of exametazime as a chelating agent for the radioisotope technetium-99m. both enantiomeric forms of exametazime are used—the drug is racemic. the third stereoisomer of this structure, the meso form, is not included.