Patent ID: 8809013

Claim:
A test element configured for determining glucose, comprising (i) a coenzyme-dependent enzyme comprising glucose dehydrogenase or a substrate for such an enzyme and (ii) a compound of the following general formula (I) as the coenzyme: in which A=adenine or an analogue thereof, T=in each case independently denotes O, S, U=in each case independently denotes OH, SH, BH 3 − , BCNH 2 − , V=in each case independently denotes OH or a phosphate group, W=COOR, CON(R) 2 , COR, CSN(R) 2 in which R in each case independently denotes H or C 1 -C 2 -alkyl, X 1 , X 2 =in each case independently denote O, CH 2 , CHCH 3 , C(CH 3 ) 2 , NH, NCH 3 , Y=NH, S, O, CH 2 , Z=a residue comprising a cyclic group with 5 C atoms which optionally contains a heteroatom selected from O, S and N and optionally one or more substituents, and a residue CR4 2 wherein CR4 2 is bound to the cyclic group and to X 2 , where R4=in each case independently denotes H, F, Cl, CH 3 , provided that Z and the pyridine residue are not linked by a glycosidic bond, or a salt or optionally a reduced form thereof.