The Human Metabolome Database is always used to make annotation for metabolomics studies. However, I am not sure which version of hmdb used in some packages like xMSannotator or MAIT. Then I suddenly realized I could directly grab the most updated version from their website and make annotation with those data. When you have a hammer, you always want to hit a nail.
The most updated version is from 2018-04-10 in xml formats. Well, since I deal with the rss …