1435
Ritanserin - treated rats ( 4 microg / 0 . 5 microl / side ) showed a significant decrease in the mentioned parameters as compared to DMSO - treated group .
 Chemical: Ritanserin; Chemical: DMSO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Ritanserin; Chemical: DMSO