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The anti - hyperthermic effect of Lu AF21934 ( 5 mg / kg ) in the SIH test was inhibited by the benzodiazepine receptor antagonist flumazenil ( 10 mg / kg ) and was not serotonin - dependent , as it persisted in serotonin - deficient mice and upon blockade of either 5 - HT ( 1A ) receptors by WAY100635 , or 5 - HT ( 2A / 2C ) receptors by ritanserin .
 Chemical: Lu AF21934; Chemical: benzodiazepine; Chemical: flumazenil; Chemical: serotonin; Chemical: serotonin; Chemical: 5 - HT; Chemical: WAY100635; Chemical: 5 - HT; Chemical: ritanserin
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: Lu AF21934; Chemical: benzodiazepine; Chemical: flumazenil; Chemical: serotonin; Chemical: serotonin; Chemical: 5 - HT; Chemical: WAY100635; Chemical: 5 - HT; Chemical: ritanserin