9396
Importantly , 3 - aminopyridine - 2 - carboxaldehyde thiosemicarbazone ( 3 - AP ) has been investigated in > 20 phase I and II clinical trials .
 Chemical: 3 - aminopyridine - 2 - carboxaldehyde thiosemicarbazone; Chemical: 3 - AP
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: 3 - aminopyridine - 2 - carboxaldehyde thiosemicarbazone; Chemical: 3 - AP