2391
We examined in cats the 1 ) ulcerogenic effects of selective COX - 1 ( SC - 560 , ketorolac ) and COX - 2 ( celecoxib , meloxicam ) inhibitors on the gastrointestinal mucosa , 2 ) effect of feeding and cimetidine on the expression of COX isoforms and prostaglandin E ( 2 ) ( PGE ( 2 ) ) level in the duodenum , and 3 ) localization of COX isoforms in the duodenum .
 Chemical: SC - 560; Chemical: ketorolac; Chemical: celecoxib; Chemical: meloxicam; Chemical: cimetidine; Chemical: prostaglandin E ( 2 ); Chemical: PGE ( 2 )
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: SC - 560; Chemical: ketorolac; Chemical: celecoxib; Chemical: meloxicam; Chemical: cimetidine; Chemical: prostaglandin E ( 2 ); Chemical: PGE ( 2 )