2673-23-6 4,4'-Biphenyldiglyoxaldehyde 4,4'-Biphenyldiglyoxyladlehyde 4,4'-Biphenyldiglyoxylaldehyde 4,4'-Diphenyldicarboxaldehyde NSC43841 Xenadial Xenygloxal Xenylgloxal [1,1'-Biphenyl]-4,4'-diacetaldehyde, .alpha.,.alpha.'-dioxo-