Fluorescent Probe, Singlet Oxygen Detection Agent, and Singlet Oxygen Detection Method

A fluorescent probe for detecting singlet oxygen, comprising a compound represented by Formula (1):

• wherein R1 to R4 are the same or different, and each represents hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, or substituted or unsubstituted aryl;
• R5 and R6 are the same or different, and each represents hydrogen, hydroxy, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, or substituted or unsubstituted aryl;
• R7 and R8 are the same or different, and each represents hydrogen, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted alkoxy, or acid addition salt;
• R9 and R10 are the same or different, and each represents hydroxy, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, or acid addition salt;
• n is an integer of 0 to 3;
• and m is an integer of 0 to 4.