4418
Therefore , in this study , the effects of rosemary on the activation of nuclear factor kappa beta ( NF - kB ) and mitogen - activated protein kinases ( MAPKs ) , the expression of inducible nitric oxide synthase ( iNOS ) and cyclooxygenase - 2 ( COX - 2 ) , and the production of nitric oxide ( NO ) , prostaglandin E ( 2 ) ( PGE ( 2 ) ) , and cytokine in lipopolysaccharide ( LPS ) - stimulated RAW 264 . 7 cells were investigated .
 Chemical: nitric oxide; Chemical: nitric oxide; Chemical: NO; 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: nitric oxide; Chemical: nitric oxide; Chemical: NO; Chemical: prostaglandin E ( 2 ); Chemical: PGE ( 2 )