Patent ID: 7450980

Claim:
An intracorporeal substance measuring assembly provided in an embedded type substance sensor for detecting and measuring an intracorporeal analyte, comprising: a detection layer containing at least one fluorescent indicator containing phenyl boronic acid that generates fluorescence according to the concentration of said analyte; and an optical separation layer on one side of said detection layer that is optically opaque and permits said analyte to penetrate therethrough; wherein said analyte is a saccharide, and said fluorescent indicator is represented by formula (1): where Q is a fluorescent residual group; at least one of R1, R2, and R3 is an active group bound to a base material of said detection layer; R4, R5, R6, and R7 are each at least one substituent group selected from the group consisting of hydrogen atom, alkyl, alkenyl, allyl, allylalkenyl, substituted alkyl, oxyalkyl, acyl, and halogen atom.