107885-39-2
3-[4-(dimethylamino)phenyl]-4-hydroxycyclobut-3-ene-1,2-dione
+
121-69-7
N,N-二甲基苯胺
→
~45%
88454-46-0
2,4-bis[4-(dimethylamino)phenyl]cyclobutane-1,3-dione