23665
Kappa - opioid receptor - selective dicarboxylic ester - derived salvinorin A ligands .
 Chemical: dicarboxylic ester; Chemical: salvinorin A
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: dicarboxylic ester; Chemical: salvinorin A