A fluorescent probe which specifically and efficiently traps nitrogen monoxide, zinc ion etc. to emit fluorescence is provided.A compound represented by the following general formula (I): [wherein R1 and R2 represent hydrogen atom, or a group represented by the following formula (A): (wherein X1 to X4 represent hydrogen atom, an alkyl group, or a protective group for amino group, and m and n represent 0 or 1); R3 and R4 represent hydrogen atom, a C1-6 alkyl group, or a C1-6 alkoxy group; R5 to R12 represent hydrogen atom, sulfo group, phospho group, a halogen atom, or a C1-6 alkyl group; R13 and R14 represent a C1-18 alkyl group; Z1 represents oxygen atom, sulfur atom, or —N(R15)— (wherein R15 represents hydrogen atom, or a C1-6 alkyl group); Y1 and Y2 represent —C(═O)—, —C(═S)—, or —C(R16)(R17) (wherein R16 and R17 represent a C1-6 alkyl group); and M− represents a counter ion in a number required for neutralizing the charge].