2398
Second , feeding increased both the expression of COX isoforms and PGE ( 2 ) level in the duodenum , and the effects were markedly inhibited by pretreatment with cimetidine .
 Chemical: PGE ( 2 ); Chemical: cimetidine
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: PGE ( 2 ); Chemical: cimetidine