Was listed in the USA pharmacopoeia for some 100 years until 1916. The leaves were/are used

It has been used for bladder infections [cystitis] and kidney stones as well as for rheumatic pains and gout

In animals, it seems to lower blood sugar levels

I found a recent article about it but probably a different species. See link

From the file [enough to read this[

This project confirmed that the plant Chimaphila maculata has antibacterial on
some common bacterial laboratory strains. Also searching through the literature
concluded that Chimaphila maculata may be a treatment option for diabetes because
of the inhibition of bacteria belonging to the phylum Firmicutes. Because of the lack
of literature on this plant being used to treat diabetes, there is a need for more
research in this field.