Polymer contrast agent
AssigneeKowa Company, Ltd.
InventorsTsukasa CHIDA, Nobuhiro FUJIMAKI, Marina ECHIGO
Life of this patent
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Abstract
A copolymer includes a copolymer X and a chelating agent molecule bonded to the copolymer X. The copolymer X includes structural units of (A), (B), and (C), where R1, R2, and R3 are independently a hydrogen or a C1-3 alkyl, R4 is a C1-3 alkyl, R5 is a hydrogen, a C1-18 alkyl, a 3- to 8-membered cycloalkyl optionally having a substituent, an adamantyl, a C6-18 aryl optionally having a substituent, or a 5- to 10-membered heteroaryl group optionally having a substituent, X1, X2, and X3 are independently an oxygen, a sulfur, or N—R7, R6 is a hydrogen, a leaving group, or a linker, R7 is a hydrogen or a C1-3 alkyl group, m is an integer in the range of 1 to 100, and n is an integer in the range of 0 to 3.
Claims21
A copolymer, comprising:
- a copolymer X;
- and
- a chelating agent molecule bonded to the copolymer X,
- wherein the copolymer X comprises structural units of formula (A), formula (B), and formula (C),
- where R1, R2, and R3 are the same or different and are a hydrogen atom or a C1-3 alkyl group, R4 is a C1-3 alkyl group, R5 is a hydrogen atom, a C1-18 alkyl group, a 3- to 8-membered cycloalkyl group optionally having a substituent, an adamantyl group, a C6-18 aryl group optionally having a substituent, or a 5- to 10-membered heteroaryl group optionally having a substituent, X1, X2, and X3 are the same or different and are an oxygen atom, a sulfur atom, or N—R7, R6 is a hydrogen atom, a leaving group, or a linker, R7 is a hydrogen atom or a C1-3 alkyl group, m is an integer of 1 to 100, and n is an integer of 0 to 3.
3-18. (canceled)
Dependencies are inferred from the claim text.