4795
METHODOLOGY / PRINCIPAL FINDINGS : Here , we propose a novel HDAC inhibitor , N - Hydroxy - 4 - ( 4 - phenylbutyryl - amino ) benzamide ( HTPB ) , as a potential chemotherapeutic drug for solid tumors .
 solid tumors
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 solid tumors