Patent ID: 7998543

Claim:
A dioxetane compound represented by formula (1) below: wherein R 1 and R 2 are each independently hydrogen, methyl, or ethyl, L 1 denotes —(CH 2 ) n — wherein n is an integer of 1 to 12, X 1 denotes a single bond, —O—, —O—CO— or —CO—O—, Y denotes a single bond or —CO—, M 1 is represented by formula (2) or (3) below wherein P 1 and P 3 are each independently a group selected from the group consisting of those represented by formula (4) below, and P 2 is a group selected from the group consisting of those represented by formula (5) below, and L 2 and L 3 are each denotes a single bond, —CH═CH—,—C≡C—, —O—, —O—CO—, or —CO—O—: —P 1 —L 2 —P 2 —L 3 —P 3 — (2) —P 1 —L 2 —P 3 — (3)