There has been a need for coelenteramide analogs or the like that produce fluorescent proteins which exhibit different fluorescent characteristics from those of the existing fluorescent proteins. Disclosed is a compound represented by general formula (1) (wherein R
1
represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl, a straight or branched alkyl which may optionally be substituted with an alicyclic group, an alicyclic group or a heterocyclic group; R
2
represents hydrogen or —(SO
2
)R
4
; R
3
represents hydrogen, hydroxyl, methoxy or acetoxy; R
4
represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl or a straight or branched alkyl which may optionally be substituted with an alicyclic group; and X
1
represents —C(═S)— or —SO
2
—).
已经有了对产生发出与现有荧光蛋白不同荧光特性的珊瑚
胺类似物等的需求。公开了一种由通式(1)表示的化合物(其中R1代表取代或未取代芳基,取代或未取代芳基烷基,可选择性地取代有脂环基的直链或支链烷基,脂环基或杂环基;R2代表氢或—(SO2)R4;R3代表氢,羟基,甲氧基或乙酰氧基;R4代表取代或未取代芳基,取代或未取代芳基烷基或可选择性地取代有脂环基的直链或支链烷基;X1代表—C(═S)—或—SO2—)。