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At pH 6 . 5 , paclitaxel - loaded stearoyl - PEG - polySDM micelles had a higher cytotoxic effect than the micelles incubated at pH 7 . 4 .
 Chemical: paclitaxel; Chemical: stearoyl - PEG - polySDM
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: stearoyl - PEG - polySDM