10717
Mechanistic studies reveal that the NOGEL is dependent upon repair of O ( 6 ) - methylguanine ( O ( 6 ) MeG ) by the suicide enzyme O ( 6 ) MeG - DNA methyltransferase ( MGMT ) .
 Chemical: O ( 6 ) - methylguanine; Chemical: O ( 6 ) MeG; Chemical: O ( 6 ) MeG
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 ( 6 ) - methylguanine; Chemical: O ( 6 ) MeG; Chemical: O ( 6 ) MeG