Patent ID: 7115757

Claim:
A chemiluminescent reagent, comprising: a 1,2-dioxetane derivative of the formula (I): wherein Ar is an aryl group which may have an alkyl group, an aryl group, a halogen atom, an alkoxyl group, a carboxyl group, a formyl group, an alkyl ester, an aryl ester, an alkylketone, an arylketone or a hetero ring bonded thereto, X is a substituent capable of labeling an organic compound or a biological molecule, or an ester, Y is a hydrogen atom, an acyl group or a group of the formula —Si(R 4 R 5 R 6 ), wherein each of R 4 , R 5 and R 6 which are independent of one another, is an alkyl group or an aryl group, Z is an alkyl group, an aryl group, an oxygen atom, a sulfur atom, a carbonyl group, —(CO)—O—, —O—(CO)—, —NH—, —NH—CO—, —CO—NH—, —OSi(R 7 R 8 )—, wherein each of R 7 and R 8 which are independent of each other, is an alkyl group or aryl group; or a group of the formula —(R 9 R 10 )SiO—, wherein each of R 9 and R 10 which are independent of each other, is an alkyl group or an aryl group; each of R 1 and R 2 is an alkyl group or an aryl group, and R 3 is a spacer.