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In this review , we discuss the current progress on the design and synthesis of estradiol - linked platinum complexes as the targeted antitumor drugs .
 Chemical: estradiol; Chemical: platinum
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: estradiol; Chemical: platinum