10859
A series of N - methylthio - beta - lactams with antibacterial activity were thoroughly evaluated as antioxidants .
 Chemical: N - methylthio - beta - lactams
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: N - methylthio - beta - lactams