| http://www.w3.org/ns/prov#value | - y group which forms an unstable oxide intermediate 1,2-dioxetane compound when triggered to remove X by an activating agent selected from acids, bases, salts, enzymes, inorganic and organic catalysts and electron donors so that the unstable 1,2-dioxetane compound decomposes and releases electronic energy to form light and two carbonyl containing compounds of the formula: ##STR37## wherein X is a c
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