18984
Moreover , asperolide A significantly activated MAP kinases ( ERK1 / 2 , JNK and p38 MAP kinase ) by phosphorylation , and only the inhibition of ERK activation by PD98059 reversed downregulation of G2 / M regulatory proteins CDC2 , and suppressed upregulation of p21 and p - p53 levels .
 Chemical: asperolide A; Chemical: PD98059
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; Chemical: PD98059