12580
To elaborate this series of piperidyl - oxadiazole derivatives as human 11 beta - HSD1 inhibitors , we explored the structure - activity relationship of several parts of the lead compound .
 Chemical: piperidyl - oxadiazole
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: piperidyl - oxadiazole