Patent ID: 8008088

Claim:
A small molecule metabolite reporter compound of the following formula: wherein D is a heteroatom other than O; R 1 and R 2 are different and are selected from the group consisting of H, OH, NO 2 , OCH 3 , A, or, R 1 and R 2 , taken together with the ring to which they are attached, form R 7 ; R 3 and R 4 are different and are selected from the group consisting of H, OH, B(OH) 2 , M, or R 3 and R 4 taken together with the ring to which they are attached, form R 8 ; R 5 and R 6 are different and are selected from the group consisting of H or wherein Q is H, COOH, or B(OH) 2 ; A is OH, or R 7 is R 8 is M is L, when present, is an amino-containing linking moiety; R 1 and R 2 , and R 3 and R 4 , are adjacent to each other on the rings on which they reside; and at least one boronic acid moiety is present; and salts thereof.