16886
Ruthenium ( II ) polypyridyl complexes as G - quadruplex inducing and stabilizing ligands in telomeric DNA .
 Chemical: Ruthenium ( II ) polypyridyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
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Answer:
 Chemical: Ruthenium ( II ) polypyridyl