6524
A family of cheap and easily accessible beta - amino alcohols , obtained in one step from naturally occurring amino acids , was shown to successfully catalyze the asymmetric aldol reaction between a series of ketones and aromatic aldehydes .
 Chemical: beta - amino alcohols; Chemical: amino acids; Chemical: aldol; Chemical: ketones; Chemical: aromatic aldehydes
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: beta - amino alcohols; Chemical: amino acids; Chemical: aldol; Chemical: ketones; Chemical: aromatic aldehydes