| abstract |
The present invention relates to a compound represented by the following general formula (1) or a salt thereof. In the general formula (1), R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom, a linear or branched alkyl group which may have a substituent, and the like. R 1 and R 2 may be bonded to each other to form a ring. R 3 and R 4 may be bonded to each other to form a ring. R 1 and/or R 2 may bond with the 6-membered ring bonded by -NR 1 R 2 to form a ring. R 3 and/or R 4 may be bonded to the 6-membered ring bonded by -NR 3 R 4 to form a ring. R 5 represents- 11 CH 3 , a linear or branched alkyl group which may have a substituent, and the like. R 6 represents -F, -18 F, and so on. X, Y, and Z each independently represent a carbon atom, an oxygen atom, and the like. n is 0 or 1. |