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In order to circumvent the toxic effects of vanadium , we have taken up a combinational approach wherein a novel vanadium - flavonol complex was synthesized , characterized and its toxic as well as insulin mimetic potential was evaluated in STZ - induced experimental diabetes in rats .
 Chemical: vanadium; Chemical: vanadium - flavonol; Chemical: STZ
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: vanadium; Chemical: vanadium - flavonol; Chemical: STZ