Compound or salt thereof, and method

A method of treating a patient suffering from cancer, comprising administering, to the patient, an effective amount of a compound or the salt thereof, wherein the compound is represented by Formula (I) below or a salt thereof;

• where A is a linking group represented as —X—NHCO— where X is a C1 to C6 alkylene group,
• each of R1, R2, R4, R5, R7, R8, R10, and R1 is a hydrogen atom,
• each of R3, R6, and R9 is a substituent of Formulae (iii) below;
• R12 is selected from a group of substituents represented by Formula (i) or (ii) above,
• R13 is a sulfo group,
• Ra, Rb, and Re in Formula (i) and (ii) above are substituents independently selected from C1 to C6 alkyl groups, and
• Rd in Formula (iii) above is a hydrogen atom or a C1 to C6 alkyl group, and Rx in Formula (iii) above is a substituent represented by General Formula (i) or (ii) above.

A method comprising administering a photosensitizing agent for photodynamic therapy containing a compound or the salt thereof, wherein the compound is represented by Formula (I) below or a salt thereof;

• where A is a linking group represented as —X—NHCO— where X is a C1 to C6 alkylene group,
• each of R1, R2, R4, R5, R7, R8, R10, and R11 is a hydrogen atom,
• each of R3, R6, and R9 is a substituent of Formulae (iii) below;
• R12 is selected from a group of substituents represented by Formula (i) or (ii) above,
• R13 is a sulfo group,
• Ra, Rb, and Re in Formula (i) and (ii) above are substituents independently selected from C1 to C6 alkyl groups, and
• Rd in Formula (iii) above is a hydrogen atom or a C1 to C6 alkyl group, and Rx in Formula (iii) above is a substituent represented by General Formula (i) or (ii) above.

A method comprising administering a fluorescent probe composition containing a compound or the salt thereof, wherein the compound is represented by Formula (I) below or a salt thereof;

• where A is a linking group represented as —X—NHCO— where X is a C1 to C6 alkylene group,
• each of R1, R2, R4, R5, R7, R8, R10, and R11 is a hydrogen atom,
• each of R3, R6, and R9 is a substituent of Formulae (iii) below;
• R12 is selected from a group of substituents represented by Formula (i) or (ii) above,
• R13 is a sulfo group,
• Ra, Rb, and Rc in Formula (i) and (ii) above are substituents independently selected from C1 to C6 alkyl groups, and
• Rd in Formula (iii) above is a hydrogen atom or a C1 to C6 alkyl group, and Rx in Formula (iii) above is a substituent represented by General Formula (i) or (ii) above.