3904
The presence of REM sleep was shown not to be a determining factor either for secretory pulse amplitude and frequency , as , for both , mean nocturnal values were similar with and without prior clomipramine ingestion .
 clomipramine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 clomipramine