12621
We hypothesise that the presence of silica in the formulation may have contributed to the prevention of drug precipitation in the intestinal lumen by providing an alternative binding site for CEL to adsorb to prior to re - solubilisation and absorption .
 Chemical: silica; Chemical: CEL
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: silica; Chemical: CEL