abstract |
The present invention provides a compound represented by the following Chemical Formulas 1, 4, 6 or 9.n n n n Formula 1n n n n n n n n n n Formula 4n n n n n n n n n n Formula 6n n n n n n n n n n Formula 9n n n n n n n n n Wherein Z, A, B, C, R, R 1 , R 2 , Q and n are as described above. |