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For example , the currently widely used Cremophor EL (R) - based paclitaxel ( PTX ) formulation exhibits pharmacokinetic concerns and severe side effects .
 Chemical: paclitaxel; Chemical: PTX
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: paclitaxel; Chemical: PTX