| abstract |
This compound is represented by formula (1) (one or more of pairs among R12 and R13, R13 and R14, R14 and R15, R16 and R17, R17 and R18, and R18 and R19 each independently form a ring represented by formula (2A) or a ring represented by formula (2B), or does not form a ring represented by formula (2A) and does not form a ring represented by formula (2B), and one of R12-R28 represents a bond with L2). |