(1,1'-Biphenyl)-2,2'-dicarboxaldehyde (9CI) 1210-05-5 2,2'-Biphenyldicarbaldehyde 2,2'-Biphenyldicarboxaldehyde 2,2'-Diformylbiphenyl 4-07-00-02510 (Beilstein Handbook Reference) BRN 0639166 Biphenyl-2,2'-dialdehyde DIPHENALDEHYDE Diphenic dialdehyde NSC 314066