19106
The chemo - , diastereo - , and enantioselectivities in proline and axially chiral amino sulfonamide - catalyzed direct aldol reactions between two enolizable aldehydes with different electronic nature have been studied with the aid of density functional theory ( DFT ) method .
 Chemical: proline; Chemical: amino sulfonamide; Chemical: aldehydes
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: proline, amino sulfonamide, aldehydes 
Answer:
 Chemical: proline; Chemical: amino sulfonamide; Chemical: aldehydes