Oleuropeic acid 8-O-glucoside is a terpenic compound, that can be isolated from twigs with leaves of Juniperus communis var. depressa. Oleuropeic acid 8-O-glucoside shows antibacterial activity against three strains of Helicobacter pylori (NCTC11637, NCTC11916, and OCO1), with MIC of 100 μg/mL all.
References:
[1]. Nakanishi T, et al. A monoterpene glucoside and three megastigmane glycosides from Juniperus communis var. depressa. Chem Pharm Bull (Tokyo). 2005 Jul;53(7):783-7.