17293
Simultaneous high - performance liquid chromatographic determination of a rhein - diclofenac prodrug and its active compounds .
 Chemical: rhein; Chemical: diclofenac
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: rhein; Chemical: diclofenac