30609
Both samples confirmed M5 as a product of oxidation of primary hydroxyl group of RVX - 208 to carboxylic acid .
 primary hydroxyl, RVX - 208, carboxylic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 primary hydroxyl, RVX - 208, carboxylic acid