Tellimagrandin II (Eugeniin), the first intermediate in the 4C1-glucose derived series of ellagitannins, also inhibits antibiotic resistance of drug-resistant Staphylococcus aureus[1][2].
[1]. Ruth Niemetz, et al. Oxidation of pentagalloylglucose to the ellagitannin, tellimagrandin II, by a phenol oxidase from Tellima grandiflora leaves. Phytochemistry. 2003 Feb;62(3):301-6. [2]. Yu-Wei Chang, et al. Tellimagrandin II, A Type of Plant Polyphenol Extracted from Trapa bispinosa Inhibits Antibiotic Resistance of Drug-Resistant Staphylococcus aureus. Int J Mol Sci. 2019 Nov 18;20(22):5790.