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The overall reaction for this one-pot synthesis is : The first step in this sequence is the formation of a metallocarboxylate by nucleophilic attack of hydroxide anion on a CO ligand to form a formate anion : Next solvated tetrahydrofuran is replaced by phosphine : Next the formate ligand is deprotonated again by hydroxide : These three reactions mean that carbon monoxide has been oxidized to carbon dioxide with the concomitant reduction of Ru ( II ) to Ru ( 0 ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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