8750
Moreover , glutathione - S - transferase isoenzymes have been associated with cellular outward transport of various alkylating agents , including Cy metabolites , melphalan , Bu and chlorambucil .
 Chemical: glutathione; Chemical: S; Chemical: melphalan; Chemical: chlorambucil
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: glutathione; Chemical: S; Chemical: melphalan; Chemical: chlorambucil