Multidentate aza ligands able to complex metal ions and the...

Drug – bio-affecting and body treating compositions – In vivo diagnosis or in vivo testing – Magnetic imaging agent

Reexamination Certificate

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C424S009300, C534S014000, C534S015000, C534S010000, C540S450000

Reexamination Certificate

active

10484111

ABSTRACT:
Compounds of general formula (I): in which: R1is hydrogen, C1–C20alkyl, C3–C10cycloalkyl, C4–C20cycloalkylalkyl, aryl, arylalkyl, or two R1, taken together, form a straight or cyclic C2–C10alkylene group or an ortho disubstituted arylene; R2is hydrogen, C1–C20alkyl, C3–C10cycloalkyl, C4–C20cycloalkylalkyl, aryl or aryl alkyl optionally substituted with functional groups which allow conjugation with a suitable molecule able to interact with physiological systems; R3, R4and R5are hydrogen, C1–C20alkyl, C3–C10cycloalkyl, C4–C20cycloalkylalkyl, aryl, arylalkyl; and their chelates with bi-trivalent ions of the metal elements having atomic number ranging between 20 and 31, 39, 42, 43, 44, 49, and between 57 and 83, and radioisotopes chosen among203Pb67Ga68Ga72As111In113In90Y97Ru62Cu64Cu52Fe52mMn140La175Yb153Sm166Ho149Pm177Lu142Pr159Gd212Bi47Sc149Pm67Cu,111Ag,199Au,161Tb and51Cr as well as the salts thereof with physiologically compatible bases or acids

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patent: 926351 (1963-05-01), None
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patent: WO98/05625 (1998-02-01), None
PCT International Search Report for PCT/EP02/07658 dated Oct. 10, 2002.
PCT International Preliminary Examination Report for PCT/EP02/07658 dated Aug. 5, 2003.
Caravan, P. et al: “Gadolinium(III) Chelates as MRI Contrast Agents: Structure, Dynamics, and Applications”, Chemical Reviews, American Chemical Society, vol. 99, No. 9, Sep. 1999, pp. 2293-2352.

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