2-(thian-1-ium-1-yl)benzene-1,4-diol,chloride

1,1',1'',1'''-(2,5-环己二烯-1,4-二亚基二亚甲二基)四苯

7-hydroxy-1-methoxyxanthen-9-one

2,5-bis[2-(diethylamino)ethylamino]cyclohexa-2,5-diene-1,4-dione

6,7-二甲基-4a,5,8,8alpha-四氢萘-1,4-二酮