| 摘要 |
A compound represented by the following formula (1): wherein each of R1b, R1c, R1d, R1g, R1h, R1i, R1k, R1m, R1n and R1p independently represents a hydrogen atom or a monovalent substituent, the monovalent substituents may combine with each other to form a ring, provided that at least one of R1c and R1h represents a hydrogen atom or a substituent having a positiveσp value of the Hammett's rule, each of R1a, R1e, R1f and R1j independently represents a hydrogen atom or a monovalent substituent excluding—NHY1 and—OH, Y1 represents—COR1q or—SO2R1r, and each of R1q and R1r independently represents a monovalent substituent.
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