IP Library › Granted Patent US 12,545,641
Granted Patent B2
US 12,545,641 · App. 17/798,841 · Granted Feb 10, 2026

Amphoteric fluorescent substance capable of being attached to biomaterials

Inventors: Jun-Hoe Cha (Seoul, KR); Hak-Soo Choi (Iksan-si, KR)
Assignee: C-BIOMEX CO., LTD.
C07D209/04C09K11/56
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Quick Facts
Patent No.
US 12,545,641
App. No.
17/798,841
Granted
Feb 10, 2026
Kind
B2
Abstract

The present invention provides an amphoteric fluorescent substance capable of being attached to biomaterials.

Claims (13)

1 . An amphoteric fluorescent substance comprising at least one compound represented by Structural Formula 1:

wherein in the Structural Formula 1,

L is -(L1) n -(L2),

L1 is-NH—CH 2 —(CH 2 —O—CH 2 ) m —CH 2 —C(═O)—,

L2 is one of azide, acetylene, maleimide, biotin, hydrizide,

 —R 3 —(C(═O) 2 —NH—NH 2 , and —R 4 —(S(═O) 2 —NH—NH 2 ,

each of R 3 and R 4 is C1-6 divalent aliphatic hydrocarbon, C1-6 alkylene or divalent aromatic hydrocarbon,

n is 0 or 1, and

m is an integer of 0 to 4.

2 . The amphoteric fluorescent substance of claim 1 , wherein the compound is represented by Structural Formula 2:

wherein in the Structural Formula 2, each of L1 and n is the same as defined in the Structural Formula 1.

3 . The amphoteric fluorescent substance of claim 2 , wherein the compound is represented by Structural Formula 3:

4 . The amphoteric fluorescent substance of claim 2 , wherein the compound is represented by Structural Formula 4:

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 22, 2022
From: CHA, JUN-HOE; CHOI, HAK-SOO
To: C-BIOMEX CO., LTD.
Reel/Frame 060859/0692 →
Continuity (1)
Related Publication 20230098702A1 · Mar 30, 2023
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