20963
Rats received three injections ( 90 - min intervals , 0 . 2 mL / kg ) of 0 . 9 % NaCl , 0 . 5 % ropivacaine or 1 . 0 % ropivacaine via an implanted intrathecal catheter .
 Chemical: NaCl; Chemical: ropivacaine; Chemical: ropivacaine
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: NaCl; Chemical: ropivacaine; Chemical: ropivacaine