Lambertianin C is an ellagitannin.

Lambertianin C can be found in Rubus species such as Rubus lambertianus,[2] in cloudberries (Rubus chamaemorus)[3] and in red raspberries (Rubus idaeus).

[4] Lambertianin C is trimer of casuarictin linked by sanguisorbic acid ester groups between glucopyranose moieties.

[2] It contributes to the in vitro antioxidant activity of raspberries.

[5]