25861
Synthesis of some novel biologically active piperidin - 4 - one oxime carbonates from 1 - methyl - 3alkyl - 2 , 6 - diphenylpiperidin - 4 - one oximes and substituted chloroformates was carried out in the presence of potassium carbonate as base and tetrabutylammonium bromide ( TBAB ) as catalyst .
 Chemical: piperidin - 4 - one oxime carbonates; Chemical: 1 - methyl - 3alkyl - 2 , 6 - diphenylpiperidin - 4 - one oximes; Chemical: chloroformates; Chemical: potassium carbonate; Chemical: tetrabutylammonium bromide; Chemical: TBAB
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: piperidin - 4 - one oxime carbonates; Chemical: 1 - methyl - 3alkyl - 2 , 6 - diphenylpiperidin - 4 - one oximes; Chemical: chloroformates; Chemical: potassium carbonate; Chemical: tetrabutylammonium bromide; Chemical: TBAB