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A) Synthesis of 7‐hydroxycoumarin‐dioxetane based on the traditional synthetic method. B) Short efficient synthesis of 7‐hydroxycoumarin‐dioxetane using Stille cross‐coupling reaction. C) Long‐lasting light emission effect observed by 7‐hydroxycoumarin‐dioxetane luminophore (10 mM in DMSO, activation is performed by addition of TBAF).
