26494
The results identified three compounds as precursors , and their structures can be attributed to the diastereoisomeric forms of the two beta - hydroxy derivatives of verbascoside and isoverbascoside ( beta - hydroxyacteoside and beta - hydroxyisoacteoside ) , and 2 '' - hydroxyoleuropein , all of which contain a DHPG moiety , potentially explaining the increases in the concentration of this phenolic compound in olive oil waste .
 beta - hydroxy, verbascoside, isoverbascoside, beta - hydroxyacteoside, beta - hydroxyisoacteoside, 2 '' - hydroxyoleuropein, DHPG, phenolic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 beta - hydroxy, verbascoside, isoverbascoside, beta - hydroxyacteoside, beta - hydroxyisoacteoside, 2 '' - hydroxyoleuropein, DHPG, phenolic