23122
The sensitivity difference of trans - and cis - diethylstilbestrol ( isomerizing in sample preparation processes ) by the LC / MS was measured by running a trans / cis mixture ( ratio measured by a quantitative NMR ) with and without sample matrices , and applied for the determination of total diethylstilbestrol .
 Chemical: trans - and cis - diethylstilbestrol; Chemical: diethylstilbestrol
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: trans - and cis - diethylstilbestrol; Chemical: diethylstilbestrol