58833
Alkyne trimerization describes the [ 2 + 2 + 2 ] cyclization of three alkynes , in the Dötz reaction an alkyne , carbon monoxide and a chromium carbene complex are the reactants .
 Dötz
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dötz