reaction of 1, 1′, 2, 2′-tetrakis (phenylamino) ethane with glyoxal; synthesis of n2, n3, n7, n8, 1, 4, 5, 6, 9, 10 -decaphenyltetradecahydro - dipyrazino [2, 3-b: 2, 3-e] pyrazine-2, 3, 7, 8 -tetraamine and 5, 6 -bis (ethoxy) -n2, n3, 1, 4 -tetraphenylhexahydro -2, 3- pyrazinediamine

[ ' p o l y a z a p o l y c y c l i c ' , ' h e x a b e n z y l ' , ' h e x a a z a ' , ' i s o w o r t z i t a n e ' , ' t e t r a a z a b i c y c l o [ 3 ' , 3 , ' 0 ] o c t a n e ' , 1 , ' 1 ′ ' , 2 , ' 2 ′ ' , ' t e t r a k i s ( p h e n y l a m i n o ) e t h a n e ' , ' n 2 ' , ' n 3 ' , ' n 7 ' , ' n 8 ' , 1 , 4 , 5 , 6 , 9 , 1 0 , ' d e c a p h e n y l t e t r a d e c a h y d r o d ' , ' p y r a z i n o [ 2 ' , 3 , ' b : 2 ' , 3 , ' e ] p y r a z i n e ' , 2 , 3 , 7 , 8 , ' t e t r a a m i n e ' , 5 , 6 , ' b i s ( e t h o x y ) ' , ' n 2 ' , ' n 3 ' , 1 , 4 , ' t e t r a p h e n y l h e x a ' , ' h y d r o ' , 2 , 3 , ' p y r a z i n e d i a m i n e ' ]