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Gadoteric acid, sold under the brand name Dotarem among others, is a macrocycle-structured gadolinium-based MRI contrast agent (GBCA). It consists of the organic acid DOTA as a chelating agent , and gadolinium (Gd 3+ ), and is used in form of the meglumine salt (gadoterate meglumine).
Gadobutrol contrast media is a clear, colorless-to-pale yellow solution of 1 mmol/mL formulation, available in single dose vials (2 mL, 7.5 mL, 10mL, and 15 mL), single dose pre-filled injections (7.5 mL, 10 mL, 15 mL), and pharmacy bulk packages (30 mL and 65 mL) containing multiple vials. [19]
Gadoxetic acid is a gadolinium-based MRI contrast agent. [4] Its salt, gadoxetate disodium , is marketed as Primovist in Europe and Eovist in the United States by Bayer HealthCare Pharmaceuticals .
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DOTA is derived from the macrocycle known as cyclen.The four secondary amine groups are modified by replacement of the N-H centers with N-CH 2 CO 2 H groups. The resulting aminopolycarboxylic acid, upon ionization of the carboxylic acid groups, is a high affinity chelating agent for di- and trivalent cations.
Gadopentetic acid, sold under the brand name Magnevist, is a gadolinium-based MRI contrast agent. [2]It is usually administered as a salt of a complex of gadolinium with DTPA (diethylenetriaminepentacetate) with the chemical formula A 2 [Gd(DTPA)(H 2 O)]; when cation A is the protonated form of the amino sugar meglumine the salt goes under the name "gadopentetate dimeglumine".