12043
Via the Fritsch–Buttenberg–Wiechell rearrangement , alkynes are prepared from vinyl bromides .
 Fritsch–Buttenberg–Wiechell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Fritsch–Buttenberg–Wiechell