[Dynsei]

I haven't seen anything yet, except online product labels and a mention. Don't know its active ingredients.

Just searched:
This is about ginger relieving discomfort in a menstrual problem http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3518208/

here's a (all free) PMC search of 'ginger' and 'menstrual' http://www.ncbi.nlm.nih.gov/pmc/?term=ginger+menstrual

you can also use affiliated pubmed, but it has some behind paywalls. A lot can be done with PMC