12462
Instead , straightforward and efficient alkoxycarbonylations of olefins can proceed with alkyl formates in the presence of a specific palladium catalyst .
 Chemical: olefins; Chemical: alkyl formates; Chemical: palladium
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: olefins, alkyl formates, palladium 
Answer:
 Chemical: olefins; Chemical: alkyl formates; Chemical: palladium