The two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to-to-two-to-two-to-two-to-two-to-two-to-two-to-two-to
二苯对苯二氨基联苯,N,N'-二苯基联苯胺,二苯基联苯胺