2793
Several series of 45 acetophenone derivatives bearing various alkyl or benzyl substituents were conveniently synthesized and their structures characterized by ( 1 ) H and ( 13 ) C NMR spectroscopy , HRMS and single - crystal X - ray analysis .
 Chemical: acetophenone; Chemical: alkyl; Chemical: benzyl; Chemical: ( 1 ) H; Chemical: ( 13 ) C
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: acetophenone; Chemical: alkyl; Chemical: benzyl; Chemical: ( 1 ) H; Chemical: ( 13 ) C