18985
Transfection of cells with dominant - negative Ras ( RasN17 ) mutant genes up - regulated asperolide A - induced the decrease of cyclin B1 and CDC2 , suppressed Raf , ERK activity and p53 - p21 expression , and at last , abolished G2 / M arrest .
 Chemical: asperolide A
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: asperolide A