Abstract
Ku-ding-cha contained a large amount of the caffeoyl quinic acid (CQA) derivatives, di-CQA, 16.7% in dry weight as well as mono-CQA, 9.2%. A mixture of 3,5-DiCQA and 5-CQA with an apple acetone powder (AP), containing polyphenol oxidase, showed high capturing activities towards methanethiol (MeSH), propanethiol (PrSH), and 2-propenethiol (AllSH). Two adducts from 3,5-diCQA and methanethiol (MeSH) were identified. Furthermore, drinking Ku-ding-cha and eating apple or prune reduced the amount of allyl methyl sulfide (AMS) and AllSH gas after garlic ingestion. These results indicate the good effects of CQA derivatives on in vivo deodorisation.
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