19681
A new asymmetric [ 2 + 2 + 2 ] cycloaddition of diynes to sulfonimines under rhodium catalysis that provides the corresponding enantioenriched 1 , 2 - dihydropyridines in good yields is described .
 Chemical: diynes; Chemical: sulfonimines; Chemical: rhodium; Chemical: 1 , 2 - dihydropyridines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: diynes; Chemical: sulfonimines; Chemical: rhodium; Chemical: 1 , 2 - dihydropyridines