Monoamine oxidase b imaging probe

A compound represented by formula (I):

• [wherein
• A represents a cyclic group represented by formula:
• a cycle A may be a non-substituted group, or may be optionally substituted with one or more R5 group, and each R5 represents independently of each other a C1-C6 alkyl group or a C3-C6 cycloalkyl group;
• R1 group represents a C1-C6 alkyl group or a C3-C6 cycloalkyl group;
• Z represents a group represented by formula:
• wherein
• R2 represents a halogen atom,
• R3 represents a hydroxy group,
• each R6 represents independently of each other a C1-C6 alkyl group, or a C3-C6 cycloalkyl group,
• o is an integer of 0 to 1,
• p is an integer of 0 to 1,
• q is an integer of 0 to 2;
• R4 each represents independently of each other a C1-C6 alkyl group or a C3-C6 cycloalkyl group;
• m is an integer of 0 to 3;
• n is an integer of 0 to 5;
• and
• each line that the above dotted line intersects with represents a bond to the other structural moiety of the above formula (I),
• or a pharmaceutically acceptable salt or solvate thereof.