3-(4-nitro-phenyl)-isoxazole-4,5-dicarboxylic acid dimethyl ester

1-苯基-1H-1,2,3-噻唑

二甲基1-苯基-1H-1,2,3-三唑-4,5-二羧酸酯

1,3-二苯基-1H-吡唑

dimethyl 1,3-diphenyl-1H-pyrazole-4,5-dicarboxylate