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PEGylated octreotide kept its full biological activity and higher serum half - life compared to the original octreotide .
 Chemical: PEGylated octreotide; Chemical: octreotide
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: PEGylated octreotide; Chemical: octreotide