9952
ZSTK474 ( 4a ) is a potent , pan - PI3K inhibitor currently under clinical evaluation for the treatment of cancer .
 Chemical: ZSTK474
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: ZSTK474 
Answer:
 Chemical: ZSTK474