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Chronic progesterone pretreatment ( 5 mg / kg / day for 21 days ) caused a significant increase in bupivacaine arrhythmogenicity in intact pentobarbital - anesthetized rats .
 Chemical: progesterone; Chemical: bupivacaine; Chemical: pentobarbital
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: progesterone; Chemical: bupivacaine; Chemical: pentobarbital