N-(1-ethoxycarbonyl-propen-2-yl)urea

1-甲基-2-(4-甲基苯氧基)苯

2-甲基-2-环己烯-1-酮

1,3,7,9-四丁基-5-氧代嘧啶并[5,6-g]蝶啶-5-鎓-2,4,6,8-四酮

丁酮