Patent ID: 8153811

Claim:
A latent fluorimetric probe, wherein the said latent fluorimetric probe is used for detecting the variation of concentration in an object under test, and wherein said latent fluorimetric probe has the structure of Eq. (1): wherein the structure X of said latent fluorimetric probe has the structure of Eq. (2): wherein R1 is a function group selected from COOH, H, and Cl; wherein R2 is a function group selected from NH and O; wherein R3 is a function group selected from H and CH 3 ; or wherein said structure X represents the structures of Eq. (3) or and Eq. (4) shown below: wherein R1 is a function group selected from COOH, H, and Cl; wherein R2 is a function group selected from NH and O; wherein R3 is a function group selected from H and CH 3 ; and wherein the structure Y of the fluorogenic probe has one of the structures of Eq. (5) or Eq. (6) shown below: wherein R4 and R5 is each a function group selected from COOH, H, Cl, and CH 3 (CH 2 ) n , and n is between 0 and 9.