17452
In Ropion (R) / NS and Ropion (R) / Gaster (R) / NS systems , mean particle size and particle number increased with lengthening storage time ; however , these values were dramatically increased beyond 6 h in the Ropion (R) / Primperan (R) / NS system , corresponding to a decrease in measured pH .
 Chemical: Ropion; Chemical: Ropion; Chemical: Gaster; Chemical: Ropion; Chemical: Primperan
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: Ropion; Chemical: Ropion; Chemical: Gaster; Chemical: Ropion; Chemical: Primperan