20177
The IC50 values are similar to or improved over those of the parent molecule and paclitaxel , the latter of which was used as a positive control .
 Chemical: paclitaxel
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