27192
The theoretical results confirm that the major products are formic acetic anhydride , acetic acid , and formaldehyde in the OH - initiated oxidation of VA in the presence of O2 and NO , which are in excellent agreement with the experimental findings .
 Chemical: formic acetic anhydride; Chemical: acetic acid; Chemical: formaldehyde; Chemical: OH; Chemical: O2; Chemical: NO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: formic acetic anhydride, acetic acid, formaldehyde, OH, O2, NO 
Answer:
 Chemical: formic acetic anhydride; Chemical: acetic acid; Chemical: formaldehyde; Chemical: OH; Chemical: O2; Chemical: NO