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A series of N - sulfonyl - 3 , 7 - dioxo - 5 beta - cholan - 24 - amides , ursodeoxycholic acid derivatives , have been designed and synthesized in nine steps starting from ursodeoxycholic acid .
 Chemical: N - sulfonyl - 3 , 7 - dioxo - 5 beta - cholan - 24 - amides; Chemical: ursodeoxycholic acid; Chemical: ursodeoxycholic acid
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: N - sulfonyl - 3 , 7 - dioxo - 5 beta - cholan - 24 - amides; Chemical: ursodeoxycholic acid; Chemical: ursodeoxycholic acid