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Bioluminescence (BL), the emission light resulting from the enzyme-catalyzed oxidative reaction, is a powerful imaging modality for monitoring biological phenomena both in vitro and in vivo. Coelenterazine (CTZ), the known widespread luciferin found in bioluminescent organisms, develops bioluminescence imaging (BLI). Here, we describe an approach to synthesize a series of novel CTZ derivatives for diversifying the toolbox of the BL substrates. Furthermore, we exemplify some of them display excellent BL signals in vitro and in vivo, and t