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The aim of this work is to evaluate vitamins B antimutagenic effect against alkylatings methyl - N - nitro - N - nitrosoguanidine ( MNNG ) , ethyl - N - nitro - N ' - nitrosoguanidine ( ENNG ) , frameshift mutagens 2 - aminoanthracene ( 2AA ) and 2 - acetyl - amino - fluorene ( 2AF ) and ROS - generating antibiotics norfloxacin ( NOR ) and nalidixic acid ( NLX ) , using the in vitro Ames test .
 Chemical: vitamins B; Chemical: methyl - N - nitro - N - nitrosoguanidine; Chemical: MNNG; Chemical: ethyl - N - nitro - N ' - nitrosoguanidine; Chemical: ENNG; Chemical: 2 - aminoanthracene; Chemical: 2AA; Chemical: 2 - acetyl - amino - fluorene; Chemical: 2AF; Chemical: norfloxacin; Chemical: NOR; Chemical: nalidixic acid; Chemical: NLX
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: vitamins B; Chemical: methyl - N - nitro - N - nitrosoguanidine; Chemical: MNNG; Chemical: ethyl - N - nitro - N ' - nitrosoguanidine; Chemical: ENNG; Chemical: 2 - aminoanthracene; Chemical: 2AA; Chemical: 2 - acetyl - amino - fluorene; Chemical: 2AF; Chemical: norfloxacin; Chemical: NOR; Chemical: nalidixic acid; Chemical: NLX