14614
Ticlopidine significantly and stereoselectively ( S > R ) inhibited methadone N - demethylation , decreasing plasma metabolite / methadone area under the curve ratios and metabolite formation clearances .
 Chemical: Ticlopidine; Chemical: methadone; Chemical: N; Chemical: methadone
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: Ticlopidine; Chemical: methadone; Chemical: N; Chemical: methadone