28500
MATERIALS AND METHODS : Acetone extract and its sub - fractions of Acacia ferruginea stem bark were subjected to assess their antioxidant potential using various in vitro systems such as DPPH ( * ) , ABTS ( * + ) scavenging , FRAP and phosphomolybdenum reduction activities .
 Chemical: Acetone; Chemical: DPPH ( * ); Chemical: ABTS ( * + ); Chemical: phosphomolybdenum
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: Acetone; Chemical: DPPH ( * ); Chemical: ABTS ( * + ); Chemical: phosphomolybdenum