| abstract |
This invention provides a novel fluorescent compound, which has a high level of lightfastness, a high level of fluorescent quantum yield, and a sharp absorption spectrum, emits fluorescence in a long-wavelength region, and has a high molar extinction coefficient, and use of the fluorescent compound as a labeling agent. In the following general formula [I], R1 together with R2, and/or R6 together with R7 can form a specific hetero ring to realize a longer wavelength of fluorescence and an improved molar extinction coefficient while maintaining excellent properties such as a high level of lightfastness, a high fluorescence quantum yield, and a sharp absorption spectrum possessed by the fluorescent dye having a borondipyrromethene skeleton. |