Technetium (99mTc) exametazime

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Technetium (99mTc) exametazime
Tc-99m exametazime skeletal.svg
Clinical data
Trade names Medi-Exametazim
License data
Routes of
administration 		Intravenous
ATC code
Legal status
Legal status
Identifiers
  • [[(3RS,3'RS)-3,3'-[(2,2-Dimethyltrimethylene)diimino][di-2-butanone]dioximato](3–)-N,N',N'',N''']oxotechnetium (99mTc)
CAS Number
PubChem CID
UNII
Chemical and physical data
Formula C13H25N4O3Tc
Molar mass 383 g·mol−1
3D model (JSmol)
Chirality racemic
  • CC1(C)CN2[Tc]3(N4C1)([N](O[H]O[N]3=C(C)[C@H]4C)=C(C)[C@H]2C)=O

  • CC1(C)CN2[Tc]3(N4C1)([N](O[H]O[N]3=C(C)[C@@H]4C)=C(C)[C@@H]2C)=O
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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 [1] and other cerebrovascular diseases. It can also be used for the labelling of leukocytes to localise intra-abdominal infections [2] and inflammatory bowel disease. [3] Exametazime (the part without technetium) is sometimes referred to as hexamethylpropylene amine oxime or HMPAO, although correct chemical names are: [4]

Contents

Chemistry

One of the two enantiomers of exametazime Exametazime.png
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. [5] The third stereoisomer of this structure, the meso form, is not included.

References

  1. ↑ Moretti JL, Defer G, Cinotti L, Cesaro P, Degos JD, Vigneron N, et al. (1990). ""Luxury perfusion" with 99mTc-HMPAO and 123I-IMP SPECT imaging during the subacute phase of stroke". European Journal of Nuclear Medicine. 16 (1): 17–22. doi:10.1007/BF01566007. PMID   2307169. S2CID   11934803.
  2. ↑ Weldon MJ, Joseph AE, French A, Saverymuttu SH, Maxwell JD (October 1995). "Comparison of 99m technetium hexamethylpropylene-amine oxime labelled leucocyte with 111-indium tropolonate labelled granulocyte scanning and ultrasound in the diagnosis of intra-abdominal abscess". Gut. 37 (4): 557–64. doi:10.1136/gut.37.4.557. PMC   1382910 . PMID   7489945.
  3. ↑ Ui K, Yamaguchi T (December 1991). "[Therapy and diagnosis of emergency shock patients]". Nihon Naika Gakkai Zasshi. The Journal of the Japanese Society of Internal Medicine. 80 (12): 1892–6. doi: 10.2169/naika.80.1892 . PMID   1804909.
  4. ↑ "Exametazime". PubChem . National Institutes of Health.
  5. ↑ "Monography in the European Pharmacopoeia" (PDF).
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