24993
A series of hybrids from O ( 2 ) - ( 2 , 4 - dinitrophenyl ) diazeniumdiolate and oleanolic acid ( OA ) were designed , synthesized , and biologically evaluated as novel nitric oxide ( NO ) releasing prodrugs which could be activated by glutathione S - transferase pi ( GST pi ) overexpressed in a number of cancer cells .
 Chemical: O ( 2 ) - ( 2 , 4 - dinitrophenyl ) diazeniumdiolate; Chemical: oleanolic acid; Chemical: nitric oxide; Chemical: NO; Chemical: glutathione
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: O ( 2 ) - ( 2 , 4 - dinitrophenyl ) diazeniumdiolate; Chemical: oleanolic acid; Chemical: nitric oxide; Chemical: NO; Chemical: glutathione