12764
The proportions of SIS copolymer , tackifying resin and plasticizer were selected as the independent variables while tack force , peel strength of the patch and skin penetrability of methyl salicylate were selected as the dependent variables .
 Chemical: SIS; Chemical: methyl salicylate
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: SIS; Chemical: methyl salicylate