6533
1 . In this article , metabolites of ginkgolic acid ( GA ) ( 15 : 1 ) in rats plasma , bile , urine and faeces after oral administration have been investigated for the first time by high - performance liquid chromatography coupled to tandem mass spectrometry ( HPLC - MS / MS ) with the aid of on - line hydrogen / deuterium ( H / D ) exchange technique and beta - glucuronidase hydrolysis experiments .
 Chemical: ginkgolic acid; Chemical: hydrogen; Chemical: deuterium; Chemical: H; Chemical: D
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: ginkgolic acid; Chemical: hydrogen; Chemical: deuterium; Chemical: H; Chemical: D