Patent ID: 6844453

Claim:
A 1,2-dioxetane derivative of the formula (III): wherein Ar is an aryl group which may have an alkyl group, an aryl group, a halogen atom, and alkoxyl group, a carboxyl group, a formyl group, an alkyl ester, an aryl ester, an alkyletone, an arylketone or a hetero ring bonded thereto, X is a substituent capable of labeling an organic compound to a biological molecule, or an ester, V is a carbonyl group or a group of the formula —Si(R 15 R 16 )— , (wherein each of R 15 and R 16 which are independent of each other, is an alkyl group or an aryl group), each of R 11 and R 12 which are independent of each other, is a hydrogen atom, an alkyl group or an aryl group, or R 11 and R 12 may together form a cyclic or polycyclic organic ring group spiro-bonded to the dioxetane ring, R 13 is an alkyl group or an aryl group, or R 13 and R 11 , or R 13 and R 12 , may together form a condensed ring containing the dioxetene ring and a hereto atom, and R 14 is a spacer.