26580
However , the content of t - 2 - heptenal and 1 - octen - 3 - ol in the riboflavin sensitised O / W emulsions was not significantly correlated with the beta - carotene concentration , which indicates that beta - carotene in the lipid particles effectively quenched singlet oxygen .
 Chemical: t - 2 - heptenal; Chemical: 1 - octen - 3 - ol; Chemical: riboflavin; Chemical: beta - carotene; Chemical: beta - carotene; Chemical: oxygen
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: t - 2 - heptenal; Chemical: 1 - octen - 3 - ol; Chemical: riboflavin; Chemical: beta - carotene; Chemical: beta - carotene; Chemical: oxygen