14636
The most active derivative 16g possessed an identical side chain in the C2 position to roscovitine ; this compound displayed approximately five fold higher inhibitory activity towards CDK2 / cyclin E and more than ten fold increase in cytotoxicity in MCF7 cells .
 Chemical: roscovitine
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: roscovitine