(1,1'-Biphenyl)-3,3'-dicarboxaldehyde, 6,6'-dihydroxy-5,5'-dimethoxy- (9CI) 2092-49-1 3,3'-Biphenyldicarboxaldehyde, 6,6'-dihydroxy-5,5'-dimethoxy- (8CI) 5,5'-Bivanillin Dehydrodivanillin NSC 16723