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AssigneeCanon Kabushiki Kaisha
InventorsTeruyuki Kondo, Hiroshi Tsujita, Zainul Abedin Siddique, Shingo Matsuki, Hiroki Miura, Hidehito Tochio, Tetsuya Matsuda, Michiko Narazaki, Hidetoshi Tsuzuki, Katsuaki Kuge, Yoshinori Tomida, Kimihiro Yoshimura, Tetsuya Yano
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A core of a cyclic structure represented by (—N—(CH2)n—)k is bonded to a dendrimer-type side chain with a specific branched structure at all nitrogen atoms in the core to produce a compound with a specific structure for producing a metal complex that exhibits a T1-reducing effect, and the resulting compound is coordinated to a metal ion that has a T1-reducing effect to obtain a metal complex that exhibits an excellent T1-reducing effect which is useful as an effective component of an MRI contrast agent and an MRI contrast agent using the same.
A metal complex compound represented by formula (1), which is coordinated to a metal ion selected from the group consisting of a lanthanoid ion, a manganese ion, a chromium ion, and an iron ion:
Dependencies are inferred from the claim text.