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OBJECTIVE : To compare the antihypertensive efficacy of a new angiotensin II antagonist , valsartan , with a reference therapy , amlodipine .
 Chemical: angiotensin II; Chemical: valsartan; Chemical: amlodipine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: angiotensin II; Chemical: valsartan; Chemical: amlodipine