21082
An efficient gram - scale synthesis of the active enantiomer BMS - 593214 was developed , which required significant optimization of the key Povarov annulation .
 Chemical: BMS - 593214
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: BMS - 593214