6525
These aldol reactions furnished the corresponding beta - hydroxy ketones with up to 93 % isolated yield and 89 % ee .
 Chemical: aldol; Chemical: beta - hydroxy ketones
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: aldol; Chemical: beta - hydroxy ketones