1226-46-6 4,4'-Bis(dimethylamino)thiobenzophenone Benzophenone, 4,4'-bis(dimethylamino)thio- (8CI) EINECS 214-962-6 Methanethione, bis(4-(dimethylamino)phenyl)- Michler's thioketone Michler's thione NSC 30656 Thio-michler's ketone p,p'-Bis(dimethylamino)thiobenzophenone