Fluorescent compound and fluorescent labeled biological substance using the same

A fluorescent compound represented by Formula (1) or Formula (4),

• in the formula, X represents CR5 or N,
• R1 to R6 represent a halogen atom, a cyano group, or a group represented by Formula (A),
• R7 represents an alkyl group, a cycloalkyl group, an aliphatic heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, an aryloxy group, an arylthio group, an aryl group, a heteroaryl group, or a halogen atom, where R6 and R7 do not bond to each other to form a ring,
• Q1 and Q2 represent a group represented by any one of Formulae (1-1) to (1-3),
• L1 and L2 represent an alkylene group, an alkenylene group, an arylene group, a heteroarylene group, a cycloalkylene group, a cycloalkenylene group, a divalent aliphatic heterocyclic group, or a group represented by any one of Formulae (1-1) to (1-8), or a linking group formed by combining two to four of these groups, and
• a ring β1 and a ring β2 are a 5- to 8-membered ring,
• provided that at least one of R1 to R7, L1, L2, Q1, or Q2 has at least one of a carboxy group or a salt thereof, a sulfo group or a salt thereof, a phosphono group or a salt thereof, an onio group selected from the group consisting of an ammonio group, a sulfonio group and a phosphonio group, or a polyamino acid residue,
• in a case where X is CR5, where R5 is a group represented by Formula (A), the ring pi and the ring β2 are a 6-membered ring, and L1 and L2 are an arylene group, (a) there is no case in which L3 is a single bond and Rill is an aryl group having a linear alkyl group having 18 or more carbon atoms, as a substituent, and (b) there is no case in which L3 is arylene group and R111 is a linear alkyl group having 18 or more carbon atoms, and
• in a case where X is CR5, where R5 is a group represented by Formula (A), the ring pi and the ring β2 are a 6-membered ring, L1 and L2 are an arylene group, and R111 has a substituent having a dipyrromethene boron complex structure, the dipyrromethene boron complex structure has a structure in which a dipyrromethene skeleton is coordinately bonded to a boron atom in a tridentate or tetradentate coordination,
• *L3-R111 Formula (A)
• in the formula, L3 represents a single bond or a linking group formed by combining one or two or more of an alkylene group, an arylene group, and a group represented by any one of Formulae (1-1) to (1-8),
• R11 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, or a monovalent aliphatic heterocyclic group, and
• * represents a bonding portion,
• in the formula, R11 and R12 represent a hydrogen atom or a substituent, and
• * represents a bonding portion.