22882
Ornidazole [ R , S - 1 - chloro - 3 - ( 2 - methyl - 5 - nitro - 1H - imidazol - 1 - yl ) propan - 2 - ol ] is a chiral 5 - nitroimidazole class antimicrobial agent .
 Chemical: Ornidazole; Chemical: R , S - 1 - chloro - 3 - ( 2 - methyl - 5 - nitro - 1H - imidazol - 1 - yl ) propan - 2 - ol; Chemical: 5 - nitroimidazole
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: Ornidazole; Chemical: R , S - 1 - chloro - 3 - ( 2 - methyl - 5 - nitro - 1H - imidazol - 1 - yl ) propan - 2 - ol; Chemical: 5 - nitroimidazole