9779
Taking advantage of the particular reactivity of the cyanocarbene intermediates involved in this system , the scope of compatible substrates could be extended to substituted allenes , leading to the development of the first catalytic enantioselective method for the synthesis of diacceptor alkylidenecyclopropanes .
 Chemical: cyanocarbene; Chemical: allenes; Chemical: alkylidenecyclopropanes
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: cyanocarbene; Chemical: allenes; Chemical: alkylidenecyclopropanes